Finding the Fourth Proportional to 2,600.88, 3,589.07 and 1,421.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,600.88 : 3,589.07 = 1,421.72 : x
2. Step 2: Convert to fraction form
   2,600.88/3,589.07 = 1,421.72/x
3. Step 3: Cross multiply
   2,600.88x = 3,589.07 × 1,421.72
4. Step 4: Simplify right side
   2,600.88x = 5,102,641.01
5. Step 5: Solve for x
   x = 5,102,641.01/2,600.88
6. Step 6: Final answer
   x = 1,961.89