Finding the Third Proportional to 15,850.50 and 18,118.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,850.50 : 18,118.50 = 18,118.50 : x
2. Step 2: Convert to fraction form
   15,850.50/18,118.50 = 18,118.50/x
3. Step 3: Cross multiply
   15,850.50x = 18,118.50 × 18,118.50
4. Step 4: Simplify right side
   15,850.50x = 328,280,042.25
5. Step 5: Solve for x
   x = 328,280,042.25/15,850.50
6. Step 6: Final answer
   x = 20,711.02