Finding the Third Proportional to 11,643 and 18,019.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,643 : 18,019.50 = 18,019.50 : x
2. Step 2: Convert to fraction form
   11,643/18,019.50 = 18,019.50/x
3. Step 3: Cross multiply
   11,643x = 18,019.50 × 18,019.50
4. Step 4: Simplify right side
   11,643x = 324,702,380.25
5. Step 5: Solve for x
   x = 324,702,380.25/11,643
6. Step 6: Final answer
   x = 27,888.21