Finding the Fourth Proportional to 10,722.17, 16,086.13 and 4,480.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,722.17 : 16,086.13 = 4,480.10 : x
2. Step 2: Convert to fraction form
   10,722.17/16,086.13 = 4,480.10/x
3. Step 3: Cross multiply
   10,722.17x = 16,086.13 × 4,480.10
4. Step 4: Simplify right side
   10,722.17x = 72,067,471.01
5. Step 5: Solve for x
   x = 72,067,471.01/10,722.17
6. Step 6: Final answer
   x = 6,721.35