Finding the Fourth Proportional to 76,557.28, 105,645.76 and 42,565.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,557.28 : 105,645.76 = 42,565.72 : x
2. Step 2: Convert to fraction form
   76,557.28/105,645.76 = 42,565.72/x
3. Step 3: Cross multiply
   76,557.28x = 105,645.76 × 42,565.72
4. Step 4: Simplify right side
   76,557.28x = 4,496,887,839.35
5. Step 5: Solve for x
   x = 4,496,887,839.35/76,557.28
6. Step 6: Final answer
   x = 58,738.87