Finding the Fourth Proportional to 78,081.57, 107,753.15 and 42,272.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,081.57 : 107,753.15 = 42,272.18 : x
2. Step 2: Convert to fraction form
   78,081.57/107,753.15 = 42,272.18/x
3. Step 3: Cross multiply
   78,081.57x = 107,753.15 × 42,272.18
4. Step 4: Simplify right side
   78,081.57x = 4,554,960,523.36
5. Step 5: Solve for x
   x = 4,554,960,523.36/78,081.57
6. Step 6: Final answer
   x = 58,335.92