Finding the Fourth Proportional to 78,436.74, 108,243.54 and 42,626.75

Step by Step Solution

1. Step 1: Write the proportion equation
   78,436.74 : 108,243.54 = 42,626.75 : x
2. Step 2: Convert to fraction form
   78,436.74/108,243.54 = 42,626.75/x
3. Step 3: Cross multiply
   78,436.74x = 108,243.54 × 42,626.75
4. Step 4: Simplify right side
   78,436.74x = 4,614,070,589.30
5. Step 5: Solve for x
   x = 4,614,070,589.30/78,436.74
6. Step 6: Final answer
   x = 58,825.38