Finding the Fourth Proportional to 78,590.52, 108,456.30 and 42,781.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,590.52 : 108,456.30 = 42,781.56 : x
2. Step 2: Convert to fraction form
   78,590.52/108,456.30 = 42,781.56/x
3. Step 3: Cross multiply
   78,590.52x = 108,456.30 × 42,781.56
4. Step 4: Simplify right side
   78,590.52x = 4,639,929,705.83
5. Step 5: Solve for x
   x = 4,639,929,705.83/78,590.52
6. Step 6: Final answer
   x = 59,039.31