Finding the Fourth Proportional to 122,503.59, 169,025.38 and 71,487.21

Step by Step Solution

1. Step 1: Write the proportion equation
   122,503.59 : 169,025.38 = 71,487.21 : x
2. Step 2: Convert to fraction form
   122,503.59/169,025.38 = 71,487.21/x
3. Step 3: Cross multiply
   122,503.59x = 169,025.38 × 71,487.21
4. Step 4: Simplify right side
   122,503.59x = 12,083,152,741.86
5. Step 5: Solve for x
   x = 12,083,152,741.86/122,503.59
6. Step 6: Final answer
   x = 98,635.09