Finding the Third Proportional to 402,290 and 837,648

Step by Step Solution

1. Step 1: Write the proportion equation
   402,290 : 837,648 = 837,648 : x
2. Step 2: Convert to fraction form
   402,290/837,648 = 837,648/x
3. Step 3: Cross multiply
   402,290x = 837,648 × 837,648
4. Step 4: Simplify right side
   402,290x = 701,654,171,904
5. Step 5: Solve for x
   x = 701,654,171,904/402,290
6. Step 6: Final answer
   x = 1,744,150.17