Finding the Fourth Proportional to 2,601.60, 3,590.26 and 1,422.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,601.60 : 3,590.26 = 1,422.72 : x
2. Step 2: Convert to fraction form
   2,601.60/3,590.26 = 1,422.72/x
3. Step 3: Cross multiply
   2,601.60x = 3,590.26 × 1,422.72
4. Step 4: Simplify right side
   2,601.60x = 5,107,934.71
5. Step 5: Solve for x
   x = 5,107,934.71/2,601.60
6. Step 6: Final answer
   x = 1,963.38