Finding the Fourth Proportional to 78,517.25, 108,356.03 and 42,709.55

Step by Step Solution

1. Step 1: Write the proportion equation
   78,517.25 : 108,356.03 = 42,709.55 : x
2. Step 2: Convert to fraction form
   78,517.25/108,356.03 = 42,709.55/x
3. Step 3: Cross multiply
   78,517.25x = 108,356.03 × 42,709.55
4. Step 4: Simplify right side
   78,517.25x = 4,627,836,525.76
5. Step 5: Solve for x
   x = 4,627,836,525.76/78,517.25
6. Step 6: Final answer
   x = 58,940.38