Finding the Third Proportional to 2,589.47 and 3,515.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,589.47 : 3,515.91 = 3,515.91 : x
2. Step 2: Convert to fraction form
   2,589.47/3,515.91 = 3,515.91/x
3. Step 3: Cross multiply
   2,589.47x = 3,515.91 × 3,515.91
4. Step 4: Simplify right side
   2,589.47x = 12,361,596.76
5. Step 5: Solve for x
   x = 12,361,596.76/2,589.47
6. Step 6: Final answer
   x = 4,773.80