Finding the Third Proportional to 2,143.50 and 3,291.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.50 : 3,291.75 = 3,291.75 : x
2. Step 2: Convert to fraction form
   2,143.50/3,291.75 = 3,291.75/x
3. Step 3: Cross multiply
   2,143.50x = 3,291.75 × 3,291.75
4. Step 4: Simplify right side
   2,143.50x = 10,835,618.06
5. Step 5: Solve for x
   x = 10,835,618.06/2,143.50
6. Step 6: Final answer
   x = 5,055.11