Finding the Fourth Proportional to 124,465.56, 171,757.98 and 72,778.92

Step by Step Solution

1. Step 1: Write the proportion equation
   124,465.56 : 171,757.98 = 72,778.92 : x
2. Step 2: Convert to fraction form
   124,465.56/171,757.98 = 72,778.92/x
3. Step 3: Cross multiply
   124,465.56x = 171,757.98 × 72,778.92
4. Step 4: Simplify right side
   124,465.56x = 12,500,360,285.78
5. Step 5: Solve for x
   x = 12,500,360,285.78/124,465.56
6. Step 6: Final answer
   x = 100,432.28