Finding the Fourth Proportional to 11,123.28, 15,339.72 and 7,538.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,123.28 : 15,339.72 = 7,538.76 : x
2. Step 2: Convert to fraction form
   11,123.28/15,339.72 = 7,538.76/x
3. Step 3: Cross multiply
   11,123.28x = 15,339.72 × 7,538.76
4. Step 4: Simplify right side
   11,123.28x = 115,642,467.55
5. Step 5: Solve for x
   x = 115,642,467.55/11,123.28
6. Step 6: Final answer
   x = 10,396.44