Finding the Third Proportional to 287,458.50 and 604,705

Step by Step Solution

1. Step 1: Write the proportion equation
   287,458.50 : 604,705 = 604,705 : x
2. Step 2: Convert to fraction form
   287,458.50/604,705 = 604,705/x
3. Step 3: Cross multiply
   287,458.50x = 604,705 × 604,705
4. Step 4: Simplify right side
   287,458.50x = 365,668,137,025
5. Step 5: Solve for x
   x = 365,668,137,025/287,458.50
6. Step 6: Final answer
   x = 1,272,072.79