Finding the Fourth Proportional to 11,257.52, 15,513.72 and 7,939.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,257.52 : 15,513.72 = 7,939.76 : x
2. Step 2: Convert to fraction form
   11,257.52/15,513.72 = 7,939.76/x
3. Step 3: Cross multiply
   11,257.52x = 15,513.72 × 7,939.76
4. Step 4: Simplify right side
   11,257.52x = 123,175,213.51
5. Step 5: Solve for x
   x = 123,175,213.51/11,257.52
6. Step 6: Final answer
   x = 10,941.59