Finding the Third Proportional to 287,748 and 632,610

Step by Step Solution

1. Step 1: Write the proportion equation
   287,748 : 632,610 = 632,610 : x
2. Step 2: Convert to fraction form
   287,748/632,610 = 632,610/x
3. Step 3: Cross multiply
   287,748x = 632,610 × 632,610
4. Step 4: Simplify right side
   287,748x = 400,195,412,100
5. Step 5: Solve for x
   x = 400,195,412,100/287,748
6. Step 6: Final answer
   x = 1,390,784.34