Finding the Fourth Proportional to 11,407.40, 17,087.25 and 9,174.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,407.40 : 17,087.25 = 9,174.15 : x
2. Step 2: Convert to fraction form
   11,407.40/17,087.25 = 9,174.15/x
3. Step 3: Cross multiply
   11,407.40x = 17,087.25 × 9,174.15
4. Step 4: Simplify right side
   11,407.40x = 156,760,994.59
5. Step 5: Solve for x
   x = 156,760,994.59/11,407.40
6. Step 6: Final answer
   x = 13,742.05