Finding the Fourth Proportional to 11,415.30, 17,111.25 and 7,258.38

Step by Step Solution

1. Step 1: Write the proportion equation
   11,415.30 : 17,111.25 = 7,258.38 : x
2. Step 2: Convert to fraction form
   11,415.30/17,111.25 = 7,258.38/x
3. Step 3: Cross multiply
   11,415.30x = 17,111.25 × 7,258.38
4. Step 4: Simplify right side
   11,415.30x = 124,199,954.78
5. Step 5: Solve for x
   x = 124,199,954.78/11,415.30
6. Step 6: Final answer
   x = 10,880.13