Finding the Third Proportional to 1,641.88 and 2,155.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.88 : 2,155.25 = 2,155.25 : x
2. Step 2: Convert to fraction form
   1,641.88/2,155.25 = 2,155.25/x
3. Step 3: Cross multiply
   1,641.88x = 2,155.25 × 2,155.25
4. Step 4: Simplify right side
   1,641.88x = 4,645,102.56
5. Step 5: Solve for x
   x = 4,645,102.56/1,641.88
6. Step 6: Final answer
   x = 2,829.15