Finding the Third Proportional to 278,932.50 and 609,705

Step by Step Solution

1. Step 1: Write the proportion equation
   278,932.50 : 609,705 = 609,705 : x
2. Step 2: Convert to fraction form
   278,932.50/609,705 = 609,705/x
3. Step 3: Cross multiply
   278,932.50x = 609,705 × 609,705
4. Step 4: Simplify right side
   278,932.50x = 371,740,187,025
5. Step 5: Solve for x
   x = 371,740,187,025/278,932.50
6. Step 6: Final answer
   x = 1,332,724.54