Finding the Third Proportional to 12,213 and 20,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,213 : 20,479.50 = 20,479.50 : x
2. Step 2: Convert to fraction form
   12,213/20,479.50 = 20,479.50/x
3. Step 3: Cross multiply
   12,213x = 20,479.50 × 20,479.50
4. Step 4: Simplify right side
   12,213x = 419,409,920.25
5. Step 5: Solve for x
   x = 419,409,920.25/12,213
6. Step 6: Final answer
   x = 34,341.27