Finding the Fourth Proportional to 82,421.75, 123,440.36 and 60,179.96

Step by Step Solution

1. Step 1: Write the proportion equation
   82,421.75 : 123,440.36 = 60,179.96 : x
2. Step 2: Convert to fraction form
   82,421.75/123,440.36 = 60,179.96/x
3. Step 3: Cross multiply
   82,421.75x = 123,440.36 × 60,179.96
4. Step 4: Simplify right side
   82,421.75x = 7,428,635,934.89
5. Step 5: Solve for x
   x = 7,428,635,934.89/82,421.75
6. Step 6: Final answer
   x = 90,129.56