Finding the Third Proportional to 307,216 and 635,746

Step by Step Solution

1. Step 1: Write the proportion equation
   307,216 : 635,746 = 635,746 : x
2. Step 2: Convert to fraction form
   307,216/635,746 = 635,746/x
3. Step 3: Cross multiply
   307,216x = 635,746 × 635,746
4. Step 4: Simplify right side
   307,216x = 404,172,976,516
5. Step 5: Solve for x
   x = 404,172,976,516/307,216
6. Step 6: Final answer
   x = 1,315,598.72