Finding the Fourth Proportional to 113,515, 156,389.88 and 89,632.96

Step by Step Solution

1. Step 1: Write the proportion equation
   113,515 : 156,389.88 = 89,632.96 : x
2. Step 2: Convert to fraction form
   113,515/156,389.88 = 89,632.96/x
3. Step 3: Cross multiply
   113,515x = 156,389.88 × 89,632.96
4. Step 4: Simplify right side
   113,515x = 14,017,687,858.44
5. Step 5: Solve for x
   x = 14,017,687,858.44/113,515
6. Step 6: Final answer
   x = 123,487.54