Finding the Fourth Proportional to 78,385.60, 108,169.92 and 42,574.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,385.60 : 108,169.92 = 42,574.42 : x
2. Step 2: Convert to fraction form
   78,385.60/108,169.92 = 42,574.42/x
3. Step 3: Cross multiply
   78,385.60x = 108,169.92 × 42,574.42
4. Step 4: Simplify right side
   78,385.60x = 4,605,271,605.45
5. Step 5: Solve for x
   x = 4,605,271,605.45/78,385.60
6. Step 6: Final answer
   x = 58,751.50