Finding the Fourth Proportional to 2,600.91, 3,589.31 and 1,421.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,600.91 : 3,589.31 = 1,421.98 : x
2. Step 2: Convert to fraction form
   2,600.91/3,589.31 = 1,421.98/x
3. Step 3: Cross multiply
   2,600.91x = 3,589.31 × 1,421.98
4. Step 4: Simplify right side
   2,600.91x = 5,103,927.03
5. Step 5: Solve for x
   x = 5,103,927.03/2,600.91
6. Step 6: Final answer
   x = 1,962.36