Finding the Third Proportional to 1,826.69 and 3,960.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,826.69 : 3,960.78 = 3,960.78 : x
2. Step 2: Convert to fraction form
   1,826.69/3,960.78 = 3,960.78/x
3. Step 3: Cross multiply
   1,826.69x = 3,960.78 × 3,960.78
4. Step 4: Simplify right side
   1,826.69x = 15,687,788.11
5. Step 5: Solve for x
   x = 15,687,788.11/1,826.69
6. Step 6: Final answer
   x = 8,588.11