Finding the Third Proportional to 7,659 and 12,340.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,659 : 12,340.50 = 12,340.50 : x
2. Step 2: Convert to fraction form
   7,659/12,340.50 = 12,340.50/x
3. Step 3: Cross multiply
   7,659x = 12,340.50 × 12,340.50
4. Step 4: Simplify right side
   7,659x = 152,287,940.25
5. Step 5: Solve for x
   x = 152,287,940.25/7,659
6. Step 6: Final answer
   x = 19,883.53