Finding the Fourth Proportional to 11,139.28, 15,333.24 and 10,089.52

Step by Step Solution

1. Step 1: Write the proportion equation
   11,139.28 : 15,333.24 = 10,089.52 : x
2. Step 2: Convert to fraction form
   11,139.28/15,333.24 = 10,089.52/x
3. Step 3: Cross multiply
   11,139.28x = 15,333.24 × 10,089.52
4. Step 4: Simplify right side
   11,139.28x = 154,705,031.64
5. Step 5: Solve for x
   x = 154,705,031.64/11,139.28
6. Step 6: Final answer
   x = 13,888.24