Finding the Third Proportional to 2,155.78 and 3,329.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.78 : 3,329.02 = 3,329.02 : x
2. Step 2: Convert to fraction form
   2,155.78/3,329.02 = 3,329.02/x
3. Step 3: Cross multiply
   2,155.78x = 3,329.02 × 3,329.02
4. Step 4: Simplify right side
   2,155.78x = 11,082,345.03
5. Step 5: Solve for x
   x = 11,082,345.03/2,155.78
6. Step 6: Final answer
   x = 5,140.76