Finding the Third Proportional to 302,904 and 440,257.50

Step by Step Solution

1. Step 1: Write the proportion equation
   302,904 : 440,257.50 = 440,257.50 : x
2. Step 2: Convert to fraction form
   302,904/440,257.50 = 440,257.50/x
3. Step 3: Cross multiply
   302,904x = 440,257.50 × 440,257.50
4. Step 4: Simplify right side
   302,904x = 193,826,666,306.25
5. Step 5: Solve for x
   x = 193,826,666,306.25/302,904
6. Step 6: Final answer
   x = 639,894.71