Finding the Fourth Proportional to 102,014.86, 140,771.54 and 56,689.97

Step by Step Solution

1. Step 1: Write the proportion equation
   102,014.86 : 140,771.54 = 56,689.97 : x
2. Step 2: Convert to fraction form
   102,014.86/140,771.54 = 56,689.97/x
3. Step 3: Cross multiply
   102,014.86x = 140,771.54 × 56,689.97
4. Step 4: Simplify right side
   102,014.86x = 7,980,334,096.00
5. Step 5: Solve for x
   x = 7,980,334,096.00/102,014.86
6. Step 6: Final answer
   x = 78,227.18