Finding the Fourth Proportional to 2,078.91, 2,869.47 and 1,292.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.91 : 2,869.47 = 1,292.49 : x
2. Step 2: Convert to fraction form
   2,078.91/2,869.47 = 1,292.49/x
3. Step 3: Cross multiply
   2,078.91x = 2,869.47 × 1,292.49
4. Step 4: Simplify right side
   2,078.91x = 3,708,761.28
5. Step 5: Solve for x
   x = 3,708,761.28/2,078.91
6. Step 6: Final answer
   x = 1,783.99