Finding the Fourth Proportional to 78,759.30, 108,685.86 and 42,950

Step by Step Solution

1. Step 1: Write the proportion equation
   78,759.30 : 108,685.86 = 42,950 : x
2. Step 2: Convert to fraction form
   78,759.30/108,685.86 = 42,950/x
3. Step 3: Cross multiply
   78,759.30x = 108,685.86 × 42,950
4. Step 4: Simplify right side
   78,759.30x = 4,668,057,687
5. Step 5: Solve for x
   x = 4,668,057,687/78,759.30
6. Step 6: Final answer
   x = 59,269.92