Finding the Fourth Proportional to 2,087.59, 2,879.28 and 1,423.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.59 : 2,879.28 = 1,423.29 : x
2. Step 2: Convert to fraction form
   2,087.59/2,879.28 = 1,423.29/x
3. Step 3: Cross multiply
   2,087.59x = 2,879.28 × 1,423.29
4. Step 4: Simplify right side
   2,087.59x = 4,098,050.43
5. Step 5: Solve for x
   x = 4,098,050.43/2,087.59
6. Step 6: Final answer
   x = 1,963.05