Finding the Fourth Proportional to 10,997.28, 15,178.73 and 9,225.81

Step by Step Solution

1. Step 1: Write the proportion equation
   10,997.28 : 15,178.73 = 9,225.81 : x
2. Step 2: Convert to fraction form
   10,997.28/15,178.73 = 9,225.81/x
3. Step 3: Cross multiply
   10,997.28x = 15,178.73 × 9,225.81
4. Step 4: Simplify right side
   10,997.28x = 140,036,032.89
5. Step 5: Solve for x
   x = 140,036,032.89/10,997.28
6. Step 6: Final answer
   x = 12,733.70