Finding the Fourth Proportional to 102,755.79, 141,539.27 and 72,487.98

Step by Step Solution

1. Step 1: Write the proportion equation
   102,755.79 : 141,539.27 = 72,487.98 : x
2. Step 2: Convert to fraction form
   102,755.79/141,539.27 = 72,487.98/x
3. Step 3: Cross multiply
   102,755.79x = 141,539.27 × 72,487.98
4. Step 4: Simplify right side
   102,755.79x = 10,259,895,410.53
5. Step 5: Solve for x
   x = 10,259,895,410.53/102,755.79
6. Step 6: Final answer
   x = 99,847.37