Finding the Fourth Proportional to 77,565.26, 116,348.47 and 42,485.78

Step by Step Solution

1. Step 1: Write the proportion equation
   77,565.26 : 116,348.47 = 42,485.78 : x
2. Step 2: Convert to fraction form
   77,565.26/116,348.47 = 42,485.78/x
3. Step 3: Cross multiply
   77,565.26x = 116,348.47 × 42,485.78
4. Step 4: Simplify right side
   77,565.26x = 4,943,155,684.41
5. Step 5: Solve for x
   x = 4,943,155,684.41/77,565.26
6. Step 6: Final answer
   x = 63,728.99