Finding the Fourth Proportional to 11,099.72, 15,316.20 and 6,320.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,099.72 : 15,316.20 = 6,320.30 : x
2. Step 2: Convert to fraction form
   11,099.72/15,316.20 = 6,320.30/x
3. Step 3: Cross multiply
   11,099.72x = 15,316.20 × 6,320.30
4. Step 4: Simplify right side
   11,099.72x = 96,802,978.86
5. Step 5: Solve for x
   x = 96,802,978.86/11,099.72
6. Step 6: Final answer
   x = 8,721.21