Finding the Fourth Proportional to 142,708.10, 214,062.15 and 83,513.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,708.10 : 214,062.15 = 83,513.30 : x
2. Step 2: Convert to fraction form
   142,708.10/214,062.15 = 83,513.30/x
3. Step 3: Cross multiply
   142,708.10x = 214,062.15 × 83,513.30
4. Step 4: Simplify right side
   142,708.10x = 17,877,036,551.60
5. Step 5: Solve for x
   x = 17,877,036,551.60/142,708.10
6. Step 6: Final answer
   x = 125,269.95