Finding the Fourth Proportional to 142,601.05, 213,829.50 and 83,454.49

Step by Step Solution

1. Step 1: Write the proportion equation
   142,601.05 : 213,829.50 = 83,454.49 : x
2. Step 2: Convert to fraction form
   142,601.05/213,829.50 = 83,454.49/x
3. Step 3: Cross multiply
   142,601.05x = 213,829.50 × 83,454.49
4. Step 4: Simplify right side
   142,601.05x = 17,845,031,452.18
5. Step 5: Solve for x
   x = 17,845,031,452.18/142,601.05
6. Step 6: Final answer
   x = 125,139.55