Finding the Fourth Proportional to 11,238.35, 15,498.91 and 7,255.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,238.35 : 15,498.91 = 7,255.28 : x
2. Step 2: Convert to fraction form
   11,238.35/15,498.91 = 7,255.28/x
3. Step 3: Cross multiply
   11,238.35x = 15,498.91 × 7,255.28
4. Step 4: Simplify right side
   11,238.35x = 112,448,854.25
5. Step 5: Solve for x
   x = 112,448,854.25/11,238.35
6. Step 6: Final answer
   x = 10,005.82