Finding the Fourth Proportional to 102,010.86, 140,766.01 and 56,685.96

Step by Step Solution

1. Step 1: Write the proportion equation
   102,010.86 : 140,766.01 = 56,685.96 : x
2. Step 2: Convert to fraction form
   102,010.86/140,766.01 = 56,685.96/x
3. Step 3: Cross multiply
   102,010.86x = 140,766.01 × 56,685.96
4. Step 4: Simplify right side
   102,010.86x = 7,979,456,412.22
5. Step 5: Solve for x
   x = 7,979,456,412.22/102,010.86
6. Step 6: Final answer
   x = 78,221.64