Finding the Third Proportional to 12,919.50 and 21,323.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,919.50 : 21,323.25 = 21,323.25 : x
2. Step 2: Convert to fraction form
   12,919.50/21,323.25 = 21,323.25/x
3. Step 3: Cross multiply
   12,919.50x = 21,323.25 × 21,323.25
4. Step 4: Simplify right side
   12,919.50x = 454,680,990.56
5. Step 5: Solve for x
   x = 454,680,990.56/12,919.50
6. Step 6: Final answer
   x = 35,193.39