Finding the Fourth Proportional to 122,895.96, 169,551.78 and 71,892.72

Step by Step Solution

1. Step 1: Write the proportion equation
   122,895.96 : 169,551.78 = 71,892.72 : x
2. Step 2: Convert to fraction form
   122,895.96/169,551.78 = 71,892.72/x
3. Step 3: Cross multiply
   122,895.96x = 169,551.78 × 71,892.72
4. Step 4: Simplify right side
   122,895.96x = 12,189,538,645.04
5. Step 5: Solve for x
   x = 12,189,538,645.04/122,895.96
6. Step 6: Final answer
   x = 99,185.84