Finding the Fourth Proportional to 78,354.90, 108,129.42 and 42,544.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,354.90 : 108,129.42 = 42,544.62 : x
2. Step 2: Convert to fraction form
   78,354.90/108,129.42 = 42,544.62/x
3. Step 3: Cross multiply
   78,354.90x = 108,129.42 × 42,544.62
4. Step 4: Simplify right side
   78,354.90x = 4,600,325,084.72
5. Step 5: Solve for x
   x = 4,600,325,084.72/78,354.90
6. Step 6: Final answer
   x = 58,711.39