Finding the Fourth Proportional to 99,696,123.68, 137,653,561.12 and 64,434,804

Step by Step Solution

1. Step 1: Write the proportion equation
   99,696,123.68 : 137,653,561.12 = 64,434,804 : x
2. Step 2: Convert to fraction form
   99,696,123.68/137,653,561.12 = 64,434,804/x
3. Step 3: Cross multiply
   99,696,123.68x = 137,653,561.12 × 64,434,804
4. Step 4: Simplify right side
   99,696,123.68x = 8,869,680,230,669,221
5. Step 5: Solve for x
   x = 8,869,680,230,669,221/99,696,123.68
6. Step 6: Final answer
   x = 88,967,152.42