Finding the Fourth Proportional to 82,139.40, 123,208.29 and 25,979.54

Step by Step Solution

1. Step 1: Write the proportion equation
   82,139.40 : 123,208.29 = 25,979.54 : x
2. Step 2: Convert to fraction form
   82,139.40/123,208.29 = 25,979.54/x
3. Step 3: Cross multiply
   82,139.40x = 123,208.29 × 25,979.54
4. Step 4: Simplify right side
   82,139.40x = 3,200,894,082.35
5. Step 5: Solve for x
   x = 3,200,894,082.35/82,139.40
6. Step 6: Final answer
   x = 38,969.05