Finding the Fourth Proportional to 10,997.28, 16,476.48 and 7,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,997.28 : 16,476.48 = 7,290.72 : x
2. Step 2: Convert to fraction form
   10,997.28/16,476.48 = 7,290.72/x
3. Step 3: Cross multiply
   10,997.28x = 16,476.48 × 7,290.72
4. Step 4: Simplify right side
   10,997.28x = 120,125,402.27
5. Step 5: Solve for x
   x = 120,125,402.27/10,997.28
6. Step 6: Final answer
   x = 10,923.19