Finding the Fourth Proportional to 2,589.61, 3,877.20 and 2,215.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,589.61 : 3,877.20 = 2,215.94 : x
2. Step 2: Convert to fraction form
   2,589.61/3,877.20 = 2,215.94/x
3. Step 3: Cross multiply
   2,589.61x = 3,877.20 × 2,215.94
4. Step 4: Simplify right side
   2,589.61x = 8,591,642.57
5. Step 5: Solve for x
   x = 8,591,642.57/2,589.61
6. Step 6: Final answer
   x = 3,317.74