Finding the Third Proportional to 12,287.25 and 28,878.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,287.25 : 28,878.75 = 28,878.75 : x
2. Step 2: Convert to fraction form
   12,287.25/28,878.75 = 28,878.75/x
3. Step 3: Cross multiply
   12,287.25x = 28,878.75 × 28,878.75
4. Step 4: Simplify right side
   12,287.25x = 833,982,201.56
5. Step 5: Solve for x
   x = 833,982,201.56/12,287.25
6. Step 6: Final answer
   x = 67,873.79