Finding the Fourth Proportional to 142,393.02, 213,921.69 and 83,270.31

Step by Step Solution

1. Step 1: Write the proportion equation
   142,393.02 : 213,921.69 = 83,270.31 : x
2. Step 2: Convert to fraction form
   142,393.02/213,921.69 = 83,270.31/x
3. Step 3: Cross multiply
   142,393.02x = 213,921.69 × 83,270.31
4. Step 4: Simplify right side
   142,393.02x = 17,813,325,442.02
5. Step 5: Solve for x
   x = 17,813,325,442.02/142,393.02
6. Step 6: Final answer
   x = 125,099.71