Finding the Fourth Proportional to 78,660.10, 108,550.80 and 42,850

Step by Step Solution

1. Step 1: Write the proportion equation
   78,660.10 : 108,550.80 = 42,850 : x
2. Step 2: Convert to fraction form
   78,660.10/108,550.80 = 42,850/x
3. Step 3: Cross multiply
   78,660.10x = 108,550.80 × 42,850
4. Step 4: Simplify right side
   78,660.10x = 4,651,401,780
5. Step 5: Solve for x
   x = 4,651,401,780/78,660.10
6. Step 6: Final answer
   x = 59,132.92