Finding the Third Proportional to 2,155.78 and 3,523.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.78 : 3,523.92 = 3,523.92 : x
2. Step 2: Convert to fraction form
   2,155.78/3,523.92 = 3,523.92/x
3. Step 3: Cross multiply
   2,155.78x = 3,523.92 × 3,523.92
4. Step 4: Simplify right side
   2,155.78x = 12,418,025.38
5. Step 5: Solve for x
   x = 12,418,025.38/2,155.78
6. Step 6: Final answer
   x = 5,760.34