Finding the Fourth Proportional to 82,710.80, 123,929.40 and 47,589.20

Step by Step Solution

1. Step 1: Write the proportion equation
   82,710.80 : 123,929.40 = 47,589.20 : x
2. Step 2: Convert to fraction form
   82,710.80/123,929.40 = 47,589.20/x
3. Step 3: Cross multiply
   82,710.80x = 123,929.40 × 47,589.20
4. Step 4: Simplify right side
   82,710.80x = 5,897,701,002.48
5. Step 5: Solve for x
   x = 5,897,701,002.48/82,710.80
6. Step 6: Final answer
   x = 71,305.09