Finding the Fourth Proportional to 11,008.30, 16,488.15 and 6,618.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,008.30 : 16,488.15 = 6,618.10 : x
2. Step 2: Convert to fraction form
   11,008.30/16,488.15 = 6,618.10/x
3. Step 3: Cross multiply
   11,008.30x = 16,488.15 × 6,618.10
4. Step 4: Simplify right side
   11,008.30x = 109,120,225.52
5. Step 5: Solve for x
   x = 109,120,225.52/11,008.30
6. Step 6: Final answer
   x = 9,912.54