Finding the Fourth Proportional to 102,219.34, 141,061.59 and 56,896.60

Step by Step Solution

1. Step 1: Write the proportion equation
   102,219.34 : 141,061.59 = 56,896.60 : x
2. Step 2: Convert to fraction form
   102,219.34/141,061.59 = 56,896.60/x
3. Step 3: Cross multiply
   102,219.34x = 141,061.59 × 56,896.60
4. Step 4: Simplify right side
   102,219.34x = 8,025,924,861.59
5. Step 5: Solve for x
   x = 8,025,924,861.59/102,219.34
6. Step 6: Final answer
   x = 78,516.70