Finding the Fourth Proportional to 10,488.99, 15,724.17 and 3,910.71

Step by Step Solution

1. Step 1: Write the proportion equation
   10,488.99 : 15,724.17 = 3,910.71 : x
2. Step 2: Convert to fraction form
   10,488.99/15,724.17 = 3,910.71/x
3. Step 3: Cross multiply
   10,488.99x = 15,724.17 × 3,910.71
4. Step 4: Simplify right side
   10,488.99x = 61,492,668.86
5. Step 5: Solve for x
   x = 61,492,668.86/10,488.99
6. Step 6: Final answer
   x = 5,862.59