Finding the Fourth Proportional to 142,601.55, 213,830.25 and 83,454.99

Step by Step Solution

1. Step 1: Write the proportion equation
   142,601.55 : 213,830.25 = 83,454.99 : x
2. Step 2: Convert to fraction form
   142,601.55/213,830.25 = 83,454.99/x
3. Step 3: Cross multiply
   142,601.55x = 213,830.25 × 83,454.99
4. Step 4: Simplify right side
   142,601.55x = 17,845,200,958.17
5. Step 5: Solve for x
   x = 17,845,200,958.17/142,601.55
6. Step 6: Final answer
   x = 125,140.30