Finding the Fourth Proportional to 102,080.86, 140,871.46 and 56,757.42

Step by Step Solution

1. Step 1: Write the proportion equation
   102,080.86 : 140,871.46 = 56,757.42 : x
2. Step 2: Convert to fraction form
   102,080.86/140,871.46 = 56,757.42/x
3. Step 3: Cross multiply
   102,080.86x = 140,871.46 × 56,757.42
4. Step 4: Simplify right side
   102,080.86x = 7,995,500,621.23
5. Step 5: Solve for x
   x = 7,995,500,621.23/102,080.86
6. Step 6: Final answer
   x = 78,325.17