Finding the Fourth Proportional to 82,665.09, 123,899.20 and 57,569.27

Step by Step Solution

1. Step 1: Write the proportion equation
   82,665.09 : 123,899.20 = 57,569.27 : x
2. Step 2: Convert to fraction form
   82,665.09/123,899.20 = 57,569.27/x
3. Step 3: Cross multiply
   82,665.09x = 123,899.20 × 57,569.27
4. Step 4: Simplify right side
   82,665.09x = 7,132,786,497.58
5. Step 5: Solve for x
   x = 7,132,786,497.58/82,665.09
6. Step 6: Final answer
   x = 86,285.35