Finding the Fourth Proportional to 142,414.10, 213,653.55 and 83,219.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,414.10 : 213,653.55 = 83,219.30 : x
2. Step 2: Convert to fraction form
   142,414.10/213,653.55 = 83,219.30/x
3. Step 3: Cross multiply
   142,414.10x = 213,653.55 × 83,219.30
4. Step 4: Simplify right side
   142,414.10x = 17,780,098,873.52
5. Step 5: Solve for x
   x = 17,780,098,873.52/142,414.10
6. Step 6: Final answer
   x = 124,847.88