Finding the Fourth Proportional to 102,074.48, 140,867.47 and 56,757.12

Step by Step Solution

1. Step 1: Write the proportion equation
   102,074.48 : 140,867.47 = 56,757.12 : x
2. Step 2: Convert to fraction form
   102,074.48/140,867.47 = 56,757.12/x
3. Step 3: Cross multiply
   102,074.48x = 140,867.47 × 56,757.12
4. Step 4: Simplify right side
   102,074.48x = 7,995,231,898.89
5. Step 5: Solve for x
   x = 7,995,231,898.89/102,074.48
6. Step 6: Final answer
   x = 78,327.43