Finding the Fourth Proportional to 114,861, 158,517.90 and 64,569.72

Step by Step Solution

1. Step 1: Write the proportion equation
   114,861 : 158,517.90 = 64,569.72 : x
2. Step 2: Convert to fraction form
   114,861/158,517.90 = 64,569.72/x
3. Step 3: Cross multiply
   114,861x = 158,517.90 × 64,569.72
4. Step 4: Simplify right side
   114,861x = 10,235,456,417.99
5. Step 5: Solve for x
   x = 10,235,456,417.99/114,861
6. Step 6: Final answer
   x = 89,111.68