Finding the Third Proportional to 877.69 and 1,863.61

Step by Step Solution

1. Step 1: Write the proportion equation
   877.69 : 1,863.61 = 1,863.61 : x
2. Step 2: Convert to fraction form
   877.69/1,863.61 = 1,863.61/x
3. Step 3: Cross multiply
   877.69x = 1,863.61 × 1,863.61
4. Step 4: Simplify right side
   877.69x = 3,473,039.90
5. Step 5: Solve for x
   x = 3,473,039.90/877.69
6. Step 6: Final answer
   x = 3,957.03