Finding the Fourth Proportional to 102,549.50, 141,526.29 and 56,618.15

Step by Step Solution

1. Step 1: Write the proportion equation
   102,549.50 : 141,526.29 = 56,618.15 : x
2. Step 2: Convert to fraction form
   102,549.50/141,526.29 = 56,618.15/x
3. Step 3: Cross multiply
   102,549.50x = 141,526.29 × 56,618.15
4. Step 4: Simplify right side
   102,549.50x = 8,012,956,008.53
5. Step 5: Solve for x
   x = 8,012,956,008.53/102,549.50
6. Step 6: Final answer
   x = 78,137.45