Finding the Fourth Proportional to 2,079.76, 3,120.72 and 925.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.76 : 3,120.72 = 925.24 : x
2. Step 2: Convert to fraction form
   2,079.76/3,120.72 = 925.24/x
3. Step 3: Cross multiply
   2,079.76x = 3,120.72 × 925.24
4. Step 4: Simplify right side
   2,079.76x = 2,887,414.97
5. Step 5: Solve for x
   x = 2,887,414.97/2,079.76
6. Step 6: Final answer
   x = 1,388.34