Finding the Fourth Proportional to 10,644.72, 14,691.02 and 6,109.08

Step by Step Solution

1. Step 1: Write the proportion equation
   10,644.72 : 14,691.02 = 6,109.08 : x
2. Step 2: Convert to fraction form
   10,644.72/14,691.02 = 6,109.08/x
3. Step 3: Cross multiply
   10,644.72x = 14,691.02 × 6,109.08
4. Step 4: Simplify right side
   10,644.72x = 89,748,616.46
5. Step 5: Solve for x
   x = 89,748,616.46/10,644.72
6. Step 6: Final answer
   x = 8,431.28