Finding the Fourth Proportional to 142,155.39, 213,306.89 and 57,977.31

Step by Step Solution

1. Step 1: Write the proportion equation
   142,155.39 : 213,306.89 = 57,977.31 : x
2. Step 2: Convert to fraction form
   142,155.39/213,306.89 = 57,977.31/x
3. Step 3: Cross multiply
   142,155.39x = 213,306.89 × 57,977.31
4. Step 4: Simplify right side
   142,155.39x = 12,366,959,396.78
5. Step 5: Solve for x
   x = 12,366,959,396.78/142,155.39
6. Step 6: Final answer
   x = 86,996.06