Finding the Fourth Proportional to 11,144.12, 15,379.88 and 7,174.71

Step by Step Solution

1. Step 1: Write the proportion equation
   11,144.12 : 15,379.88 = 7,174.71 : x
2. Step 2: Convert to fraction form
   11,144.12/15,379.88 = 7,174.71/x
3. Step 3: Cross multiply
   11,144.12x = 15,379.88 × 7,174.71
4. Step 4: Simplify right side
   11,144.12x = 110,346,142.96
5. Step 5: Solve for x
   x = 110,346,142.96/11,144.12
6. Step 6: Final answer
   x = 9,901.74