Finding the Fourth Proportional to 15,565.27, 21,480.05 and 8,491.69

Step by Step Solution

1. Step 1: Write the proportion equation
   15,565.27 : 21,480.05 = 8,491.69 : x
2. Step 2: Convert to fraction form
   15,565.27/21,480.05 = 8,491.69/x
3. Step 3: Cross multiply
   15,565.27x = 21,480.05 × 8,491.69
4. Step 4: Simplify right side
   15,565.27x = 182,401,925.78
5. Step 5: Solve for x
   x = 182,401,925.78/15,565.27
6. Step 6: Final answer
   x = 11,718.52