Finding the Third Proportional to 3,916.50 and 8,155.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.50 : 8,155.50 = 8,155.50 : x
2. Step 2: Convert to fraction form
   3,916.50/8,155.50 = 8,155.50/x
3. Step 3: Cross multiply
   3,916.50x = 8,155.50 × 8,155.50
4. Step 4: Simplify right side
   3,916.50x = 66,512,180.25
5. Step 5: Solve for x
   x = 66,512,180.25/3,916.50
6. Step 6: Final answer
   x = 16,982.56