Finding the Fourth Proportional to 2,600.90, 3,589.48 and 1,422.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,600.90 : 3,589.48 = 1,422.15 : x
2. Step 2: Convert to fraction form
   2,600.90/3,589.48 = 1,422.15/x
3. Step 3: Cross multiply
   2,600.90x = 3,589.48 × 1,422.15
4. Step 4: Simplify right side
   2,600.90x = 5,104,778.98
5. Step 5: Solve for x
   x = 5,104,778.98/2,600.90
6. Step 6: Final answer
   x = 1,962.70