Finding the Third Proportional to 12,399.75 and 28,630.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,399.75 : 28,630.13 = 28,630.13 : x
2. Step 2: Convert to fraction form
   12,399.75/28,630.13 = 28,630.13/x
3. Step 3: Cross multiply
   12,399.75x = 28,630.13 × 28,630.13
4. Step 4: Simplify right side
   12,399.75x = 819,684,057.52
5. Step 5: Solve for x
   x = 819,684,057.52/12,399.75
6. Step 6: Final answer
   x = 66,104.89