Finding the Third Proportional to 287,724 and 451,345.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,724 : 451,345.50 = 451,345.50 : x
2. Step 2: Convert to fraction form
   287,724/451,345.50 = 451,345.50/x
3. Step 3: Cross multiply
   287,724x = 451,345.50 × 451,345.50
4. Step 4: Simplify right side
   287,724x = 203,712,760,370.25
5. Step 5: Solve for x
   x = 203,712,760,370.25/287,724
6. Step 6: Final answer
   x = 708,014.49