Finding the Fourth Proportional to 42,002.80, 57,811.80 and 39,583.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,002.80 : 57,811.80 = 39,583.60 : x
2. Step 2: Convert to fraction form
   42,002.80/57,811.80 = 39,583.60/x
3. Step 3: Cross multiply
   42,002.80x = 57,811.80 × 39,583.60
4. Step 4: Simplify right side
   42,002.80x = 2,288,399,166.48
5. Step 5: Solve for x
   x = 2,288,399,166.48/42,002.80
6. Step 6: Final answer
   x = 54,482.06