Finding the Third Proportional to 7,643.50 and 12,161.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,643.50 : 12,161.50 = 12,161.50 : x
2. Step 2: Convert to fraction form
   7,643.50/12,161.50 = 12,161.50/x
3. Step 3: Cross multiply
   7,643.50x = 12,161.50 × 12,161.50
4. Step 4: Simplify right side
   7,643.50x = 147,902,082.25
5. Step 5: Solve for x
   x = 147,902,082.25/7,643.50
6. Step 6: Final answer
   x = 19,350.05