Finding the Third Proportional to 645,042 and 1,375,631

Step by Step Solution

1. Step 1: Write the proportion equation
   645,042 : 1,375,631 = 1,375,631 : x
2. Step 2: Convert to fraction form
   645,042/1,375,631 = 1,375,631/x
3. Step 3: Cross multiply
   645,042x = 1,375,631 × 1,375,631
4. Step 4: Simplify right side
   645,042x = 1,892,360,648,161
5. Step 5: Solve for x
   x = 1,892,360,648,161/645,042
6. Step 6: Final answer
   x = 2,933,701.45