Finding the Third Proportional to 287,256 and 454,645.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,256 : 454,645.50 = 454,645.50 : x
2. Step 2: Convert to fraction form
   287,256/454,645.50 = 454,645.50/x
3. Step 3: Cross multiply
   287,256x = 454,645.50 × 454,645.50
4. Step 4: Simplify right side
   287,256x = 206,702,530,670.25
5. Step 5: Solve for x
   x = 206,702,530,670.25/287,256
6. Step 6: Final answer
   x = 719,576.03