Finding the Third Proportional to 12,865.50 and 28,653.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,865.50 : 28,653.75 = 28,653.75 : x
2. Step 2: Convert to fraction form
   12,865.50/28,653.75 = 28,653.75/x
3. Step 3: Cross multiply
   12,865.50x = 28,653.75 × 28,653.75
4. Step 4: Simplify right side
   12,865.50x = 821,037,389.06
5. Step 5: Solve for x
   x = 821,037,389.06/12,865.50
6. Step 6: Final answer
   x = 63,816.98