Finding the Fourth Proportional to 82,454.96, 123,613.18 and 57,421.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,454.96 : 123,613.18 = 57,421.10 : x
2. Step 2: Convert to fraction form
   82,454.96/123,613.18 = 57,421.10/x
3. Step 3: Cross multiply
   82,454.96x = 123,613.18 × 57,421.10
4. Step 4: Simplify right side
   82,454.96x = 7,098,004,770.10
5. Step 5: Solve for x
   x = 7,098,004,770.10/82,454.96
6. Step 6: Final answer
   x = 86,083.42