Finding the Fourth Proportional to 99,916.96, 149,146.52 and 87,305.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,916.96 : 149,146.52 = 87,305.50 : x
2. Step 2: Convert to fraction form
   99,916.96/149,146.52 = 87,305.50/x
3. Step 3: Cross multiply
   99,916.96x = 149,146.52 × 87,305.50
4. Step 4: Simplify right side
   99,916.96x = 13,021,311,501.86
5. Step 5: Solve for x
   x = 13,021,311,501.86/99,916.96
6. Step 6: Final answer
   x = 130,321.33