Finding the Fourth Proportional to 142,908.10, 214,216.35 and 83,713.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,908.10 : 214,216.35 = 83,713.30 : x
2. Step 2: Convert to fraction form
   142,908.10/214,216.35 = 83,713.30/x
3. Step 3: Cross multiply
   142,908.10x = 214,216.35 × 83,713.30
4. Step 4: Simplify right side
   142,908.10x = 17,932,757,572.46
5. Step 5: Solve for x
   x = 17,932,757,572.46/142,908.10
6. Step 6: Final answer
   x = 125,484.54