Finding the Fourth Proportional to 17,139.99, 25,712.69 and 7,279.32

Step by Step Solution

1. Step 1: Write the proportion equation
   17,139.99 : 25,712.69 = 7,279.32 : x
2. Step 2: Convert to fraction form
   17,139.99/25,712.69 = 7,279.32/x
3. Step 3: Cross multiply
   17,139.99x = 25,712.69 × 7,279.32
4. Step 4: Simplify right side
   17,139.99x = 187,170,862.17
5. Step 5: Solve for x
   x = 187,170,862.17/17,139.99
6. Step 6: Final answer
   x = 10,920.13