Finding the Fourth Proportional to 82,892.31, 124,339.32 and 66,357.47

Step by Step Solution

1. Step 1: Write the proportion equation
   82,892.31 : 124,339.32 = 66,357.47 : x
2. Step 2: Convert to fraction form
   82,892.31/124,339.32 = 66,357.47/x
3. Step 3: Cross multiply
   82,892.31x = 124,339.32 × 66,357.47
4. Step 4: Simplify right side
   82,892.31x = 8,250,842,696.72
5. Step 5: Solve for x
   x = 8,250,842,696.72/82,892.31
6. Step 6: Final answer
   x = 99,536.89