Finding the Fourth Proportional to 8,997.28, 12,411.05 and 5,409.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,997.28 : 12,411.05 = 5,409.75 : x
2. Step 2: Convert to fraction form
   8,997.28/12,411.05 = 5,409.75/x
3. Step 3: Cross multiply
   8,997.28x = 12,411.05 × 5,409.75
4. Step 4: Simplify right side
   8,997.28x = 67,140,694.32
5. Step 5: Solve for x
   x = 67,140,694.32/8,997.28
6. Step 6: Final answer
   x = 7,462.33