Finding the Fourth Proportional to 10,657.27, 15,990.52 and 5,721.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,657.27 : 15,990.52 = 5,721.15 : x
2. Step 2: Convert to fraction form
   10,657.27/15,990.52 = 5,721.15/x
3. Step 3: Cross multiply
   10,657.27x = 15,990.52 × 5,721.15
4. Step 4: Simplify right side
   10,657.27x = 91,484,094.92
5. Step 5: Solve for x
   x = 91,484,094.92/10,657.27
6. Step 6: Final answer
   x = 8,584.19