Finding the Third Proportional to 640,872 and 996,300

Step by Step Solution

1. Step 1: Write the proportion equation
   640,872 : 996,300 = 996,300 : x
2. Step 2: Convert to fraction form
   640,872/996,300 = 996,300/x
3. Step 3: Cross multiply
   640,872x = 996,300 × 996,300
4. Step 4: Simplify right side
   640,872x = 992,613,690,000
5. Step 5: Solve for x
   x = 992,613,690,000/640,872
6. Step 6: Final answer
   x = 1,548,848.58