Finding the Fourth Proportional to 78,449.53, 108,261.02 and 42,639.54

Step by Step Solution

1. Step 1: Write the proportion equation
   78,449.53 : 108,261.02 = 42,639.54 : x
2. Step 2: Convert to fraction form
   78,449.53/108,261.02 = 42,639.54/x
3. Step 3: Cross multiply
   78,449.53x = 108,261.02 × 42,639.54
4. Step 4: Simplify right side
   78,449.53x = 4,616,200,092.73
5. Step 5: Solve for x
   x = 4,616,200,092.73/78,449.53
6. Step 6: Final answer
   x = 58,842.93