Finding the Fourth Proportional to 82,456.21, 123,615.06 and 57,422.35

Step by Step Solution

1. Step 1: Write the proportion equation
   82,456.21 : 123,615.06 = 57,422.35 : x
2. Step 2: Convert to fraction form
   82,456.21/123,615.06 = 57,422.35/x
3. Step 3: Cross multiply
   82,456.21x = 123,615.06 × 57,422.35
4. Step 4: Simplify right side
   82,456.21x = 7,098,267,240.59
5. Step 5: Solve for x
   x = 7,098,267,240.59/82,456.21
6. Step 6: Final answer
   x = 86,085.30