Finding the Fourth Proportional to 142,638.35, 213,617.93 and 82,540.14

Step by Step Solution

1. Step 1: Write the proportion equation
   142,638.35 : 213,617.93 = 82,540.14 : x
2. Step 2: Convert to fraction form
   142,638.35/213,617.93 = 82,540.14/x
3. Step 3: Cross multiply
   142,638.35x = 213,617.93 × 82,540.14
4. Step 4: Simplify right side
   142,638.35x = 17,632,053,433.15
5. Step 5: Solve for x
   x = 17,632,053,433.15/142,638.35
6. Step 6: Final answer
   x = 123,613.69