Finding the Third Proportional to 12,876 and 28,213.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,876 : 28,213.50 = 28,213.50 : x
2. Step 2: Convert to fraction form
   12,876/28,213.50 = 28,213.50/x
3. Step 3: Cross multiply
   12,876x = 28,213.50 × 28,213.50
4. Step 4: Simplify right side
   12,876x = 796,001,582.25
5. Step 5: Solve for x
   x = 796,001,582.25/12,876
6. Step 6: Final answer
   x = 61,820.56