Finding the Fourth Proportional to 78,436.87, 108,243.71 and 42,626.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,436.87 : 108,243.71 = 42,626.88 : x
2. Step 2: Convert to fraction form
   78,436.87/108,243.71 = 42,626.88/x
3. Step 3: Cross multiply
   78,436.87x = 108,243.71 × 42,626.88
4. Step 4: Simplify right side
   78,436.87x = 4,614,091,095.71
5. Step 5: Solve for x
   x = 4,614,091,095.71/78,436.87
6. Step 6: Final answer
   x = 58,825.54