Finding the Fourth Proportional to 10,949.45, 15,101.91 and 9,439.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,949.45 : 15,101.91 = 9,439.61 : x
2. Step 2: Convert to fraction form
   10,949.45/15,101.91 = 9,439.61/x
3. Step 3: Cross multiply
   10,949.45x = 15,101.91 × 9,439.61
4. Step 4: Simplify right side
   10,949.45x = 142,556,140.66
5. Step 5: Solve for x
   x = 142,556,140.66/10,949.45
6. Step 6: Final answer
   x = 13,019.48