Finding the Fourth Proportional to 9,720.72, 14,581.31 and 7,271.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,720.72 : 14,581.31 = 7,271.10 : x
2. Step 2: Convert to fraction form
   9,720.72/14,581.31 = 7,271.10/x
3. Step 3: Cross multiply
   9,720.72x = 14,581.31 × 7,271.10
4. Step 4: Simplify right side
   9,720.72x = 106,022,126.79
5. Step 5: Solve for x
   x = 106,022,126.79/9,720.72
6. Step 6: Final answer
   x = 10,906.82