Finding the Fourth Proportional to 2,601.90, 3,590.86 and 1,423.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,601.90 : 3,590.86 = 1,423.15 : x
2. Step 2: Convert to fraction form
   2,601.90/3,590.86 = 1,423.15/x
3. Step 3: Cross multiply
   2,601.90x = 3,590.86 × 1,423.15
4. Step 4: Simplify right side
   2,601.90x = 5,110,332.41
5. Step 5: Solve for x
   x = 5,110,332.41/2,601.90
6. Step 6: Final answer
   x = 1,964.08