Finding the Fourth Proportional to 102,100.52, 140,899.01 and 56,781.42

Step by Step Solution

1. Step 1: Write the proportion equation
   102,100.52 : 140,899.01 = 56,781.42 : x
2. Step 2: Convert to fraction form
   102,100.52/140,899.01 = 56,781.42/x
3. Step 3: Cross multiply
   102,100.52x = 140,899.01 × 56,781.42
4. Step 4: Simplify right side
   102,100.52x = 8,000,445,580.49
5. Step 5: Solve for x
   x = 8,000,445,580.49/102,100.52
6. Step 6: Final answer
   x = 78,358.52