They don't provide sufficient info for an exact amount so I'll have to make a bunch of assumptions.
Theme Parks EBITDA was $34,725k.
Skypoint was about 9% of Revenue, so let's drop EBITDA by 9% to $31,600k.
Corporate costs ($15,144k) are given as a group total. For simplicity let's use a % of Revenue (in this case 2.2%). Theme Parks Revenue was $107,582k, so * 0.91 * 0.022 = $2,154k. Revised EBITDA $29,446k.
On the same group basis, Depreciation was 6.9% of Revenue. So $107,582k * 0.91 * 0.069 = $6,755k. EBIT therefore $22,691k.
Doing the same with Finance Costs, was also about 2.2% of Revenue. So take off another $2,154k, for a NPBT of $20,537k.
There's a bunch of extraordinary items and it's difficult to establish which pertain to Dreamworld. So we'll run with a pre-exceptional figure.
For tax a simple calc would be 30%, so $20,537k * 0.7 = NPAT $14,376k.
Or using % of Revenue again, NPAT $19.3m.
So best guess, $14m to $20m, more than half what Skeeta said. Depreciation and Finance Costs are the big items that can vary the figure significantly. But either way, it's considerably less than $34.7m, let alone $43.0m.
Should also point out Theme Parks EBITDA "only" increased 8.5% on the prior year.
You could also assume that profits were inflated at Dreamworld because they were underfunding maintenance of rides...