Finding the Fourth Proportional to 10,260.72, 15,393.69 and 2,865.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,260.72 : 15,393.69 = 2,865.20 : x
2. Step 2: Convert to fraction form
   10,260.72/15,393.69 = 2,865.20/x
3. Step 3: Cross multiply
   10,260.72x = 15,393.69 × 2,865.20
4. Step 4: Simplify right side
   10,260.72x = 44,105,923.62
5. Step 5: Solve for x
   x = 44,105,923.62/10,260.72
6. Step 6: Final answer
   x = 4,298.52