Finding the Third Proportional to 8,661.50 and 18,356.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,661.50 : 18,356.50 = 18,356.50 : x
2. Step 2: Convert to fraction form
   8,661.50/18,356.50 = 18,356.50/x
3. Step 3: Cross multiply
   8,661.50x = 18,356.50 × 18,356.50
4. Step 4: Simplify right side
   8,661.50x = 336,961,092.25
5. Step 5: Solve for x
   x = 336,961,092.25/8,661.50
6. Step 6: Final answer
   x = 38,903.32