Finding the Fourth Proportional to 11,189.28, 15,432.72 and 8,826.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,189.28 : 15,432.72 = 8,826.72 : x
2. Step 2: Convert to fraction form
   11,189.28/15,432.72 = 8,826.72/x
3. Step 3: Cross multiply
   11,189.28x = 15,432.72 × 8,826.72
4. Step 4: Simplify right side
   11,189.28x = 136,220,298.28
5. Step 5: Solve for x
   x = 136,220,298.28/11,189.28
6. Step 6: Final answer
   x = 12,174.18