Finding the Fourth Proportional to 2,479.92, 3,715.86 and 1,309.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,479.92 : 3,715.86 = 1,309.86 : x
2. Step 2: Convert to fraction form
   2,479.92/3,715.86 = 1,309.86/x
3. Step 3: Cross multiply
   2,479.92x = 3,715.86 × 1,309.86
4. Step 4: Simplify right side
   2,479.92x = 4,867,249.83
5. Step 5: Solve for x
   x = 4,867,249.83/2,479.92
6. Step 6: Final answer
   x = 1,962.66