Finding the Third Proportional to 12,880.50 and 28,218

Step by Step Solution

1. Step 1: Write the proportion equation
   12,880.50 : 28,218 = 28,218 : x
2. Step 2: Convert to fraction form
   12,880.50/28,218 = 28,218/x
3. Step 3: Cross multiply
   12,880.50x = 28,218 × 28,218
4. Step 4: Simplify right side
   12,880.50x = 796,255,524
5. Step 5: Solve for x
   x = 796,255,524/12,880.50
6. Step 6: Final answer
   x = 61,818.68