Finding the Third Proportional to 2,640.19 and 3,555.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.19 : 3,555.94 = 3,555.94 : x
2. Step 2: Convert to fraction form
   2,640.19/3,555.94 = 3,555.94/x
3. Step 3: Cross multiply
   2,640.19x = 3,555.94 × 3,555.94
4. Step 4: Simplify right side
   2,640.19x = 12,644,691.50
5. Step 5: Solve for x
   x = 12,644,691.50/2,640.19
6. Step 6: Final answer
   x = 4,789.32