Finding the Fourth Proportional to 78,559.94, 108,539.70 and 54,792.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,559.94 : 108,539.70 = 54,792.74 : x
2. Step 2: Convert to fraction form
   78,559.94/108,539.70 = 54,792.74/x
3. Step 3: Cross multiply
   78,559.94x = 108,539.70 × 54,792.74
4. Step 4: Simplify right side
   78,559.94x = 5,947,187,561.78
5. Step 5: Solve for x
   x = 5,947,187,561.78/78,559.94
6. Step 6: Final answer
   x = 75,702.55