Finding the Third Proportional to 2,115 and 3,160.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115 : 3,160.31 = 3,160.31 : x
2. Step 2: Convert to fraction form
   2,115/3,160.31 = 3,160.31/x
3. Step 3: Cross multiply
   2,115x = 3,160.31 × 3,160.31
4. Step 4: Simplify right side
   2,115x = 9,987,575.10
5. Step 5: Solve for x
   x = 9,987,575.10/2,115
6. Step 6: Final answer
   x = 4,722.26