Finding the Fourth Proportional to 139,422.24, 209,116.08 and 82,530

Step by Step Solution

1. Step 1: Write the proportion equation
   139,422.24 : 209,116.08 = 82,530 : x
2. Step 2: Convert to fraction form
   139,422.24/209,116.08 = 82,530/x
3. Step 3: Cross multiply
   139,422.24x = 209,116.08 × 82,530
4. Step 4: Simplify right side
   139,422.24x = 17,258,350,082.40
5. Step 5: Solve for x
   x = 17,258,350,082.40/139,422.24
6. Step 6: Final answer
   x = 123,784.77