Finding the Third Proportional to 640,404 and 1,375,785

Step by Step Solution

1. Step 1: Write the proportion equation
   640,404 : 1,375,785 = 1,375,785 : x
2. Step 2: Convert to fraction form
   640,404/1,375,785 = 1,375,785/x
3. Step 3: Cross multiply
   640,404x = 1,375,785 × 1,375,785
4. Step 4: Simplify right side
   640,404x = 1,892,784,366,225
5. Step 5: Solve for x
   x = 1,892,784,366,225/640,404
6. Step 6: Final answer
   x = 2,955,609.84