Finding the Third Proportional to 152,707 and 309,518

Step by Step Solution

1. Step 1: Write the proportion equation
   152,707 : 309,518 = 309,518 : x
2. Step 2: Convert to fraction form
   152,707/309,518 = 309,518/x
3. Step 3: Cross multiply
   152,707x = 309,518 × 309,518
4. Step 4: Simplify right side
   152,707x = 95,801,392,324
5. Step 5: Solve for x
   x = 95,801,392,324/152,707
6. Step 6: Final answer
   x = 627,354.29