Finding the Third Proportional to 10,617.75 and 16,618.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,617.75 : 16,618.50 = 16,618.50 : x
2. Step 2: Convert to fraction form
   10,617.75/16,618.50 = 16,618.50/x
3. Step 3: Cross multiply
   10,617.75x = 16,618.50 × 16,618.50
4. Step 4: Simplify right side
   10,617.75x = 276,174,542.25
5. Step 5: Solve for x
   x = 276,174,542.25/10,617.75
6. Step 6: Final answer
   x = 26,010.65