Finding the Fourth Proportional to 10,180.16, 15,239.52 and 9,206.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,180.16 : 15,239.52 = 9,206.72 : x
2. Step 2: Convert to fraction form
   10,180.16/15,239.52 = 9,206.72/x
3. Step 3: Cross multiply
   10,180.16x = 15,239.52 × 9,206.72
4. Step 4: Simplify right side
   10,180.16x = 140,305,993.57
5. Step 5: Solve for x
   x = 140,305,993.57/10,180.16
6. Step 6: Final answer
   x = 13,782.30