Finding the Third Proportional to 1,603.50 and 2,155

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603.50 : 2,155 = 2,155 : x
2. Step 2: Convert to fraction form
   1,603.50/2,155 = 2,155/x
3. Step 3: Cross multiply
   1,603.50x = 2,155 × 2,155
4. Step 4: Simplify right side
   1,603.50x = 4,644,025
5. Step 5: Solve for x
   x = 4,644,025/1,603.50
6. Step 6: Final answer
   x = 2,896.18