Finding the Fourth Proportional to 142,423.56, 213,646.68 and 83,265.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,423.56 : 213,646.68 = 83,265.30 : x
2. Step 2: Convert to fraction form
   142,423.56/213,646.68 = 83,265.30/x
3. Step 3: Cross multiply
   142,423.56x = 213,646.68 × 83,265.30
4. Step 4: Simplify right side
   142,423.56x = 17,789,354,904.20
5. Step 5: Solve for x
   x = 17,789,354,904.20/142,423.56
6. Step 6: Final answer
   x = 124,904.58