Finding the Fourth Proportional to 10,665.55, 14,724.47 and 7,397.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,665.55 : 14,724.47 = 7,397.20 : x
2. Step 2: Convert to fraction form
   10,665.55/14,724.47 = 7,397.20/x
3. Step 3: Cross multiply
   10,665.55x = 14,724.47 × 7,397.20
4. Step 4: Simplify right side
   10,665.55x = 108,919,849.48
5. Step 5: Solve for x
   x = 108,919,849.48/10,665.55
6. Step 6: Final answer
   x = 10,212.30