Finding the Fourth Proportional to 10,810.72, 14,912.40 and 8,149.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,810.72 : 14,912.40 = 8,149.78 : x
2. Step 2: Convert to fraction form
   10,810.72/14,912.40 = 8,149.78/x
3. Step 3: Cross multiply
   10,810.72x = 14,912.40 × 8,149.78
4. Step 4: Simplify right side
   10,810.72x = 121,532,779.27
5. Step 5: Solve for x
   x = 121,532,779.27/10,810.72
6. Step 6: Final answer
   x = 11,241.88