Finding the Fourth Proportional to 17,406.88, 26,112.72 and 5,721.28

Step by Step Solution

1. Step 1: Write the proportion equation
   17,406.88 : 26,112.72 = 5,721.28 : x
2. Step 2: Convert to fraction form
   17,406.88/26,112.72 = 5,721.28/x
3. Step 3: Cross multiply
   17,406.88x = 26,112.72 × 5,721.28
4. Step 4: Simplify right side
   17,406.88x = 149,398,182.68
5. Step 5: Solve for x
   x = 149,398,182.68/17,406.88
6. Step 6: Final answer
   x = 8,582.71