Finding the Fourth Proportional to 2,600.85, 3,589.28 and 1,422.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,600.85 : 3,589.28 = 1,422.00 : x
2. Step 2: Convert to fraction form
   2,600.85/3,589.28 = 1,422.00/x
3. Step 3: Cross multiply
   2,600.85x = 3,589.28 × 1,422.00
4. Step 4: Simplify right side
   2,600.85x = 5,103,941.77
5. Step 5: Solve for x
   x = 5,103,941.77/2,600.85
6. Step 6: Final answer
   x = 1,962.41