Finding the Third Proportional to 640,191 and 1,400,910

Step by Step Solution

1. Step 1: Write the proportion equation
   640,191 : 1,400,910 = 1,400,910 : x
2. Step 2: Convert to fraction form
   640,191/1,400,910 = 1,400,910/x
3. Step 3: Cross multiply
   640,191x = 1,400,910 × 1,400,910
4. Step 4: Simplify right side
   640,191x = 1,962,548,828,100
5. Step 5: Solve for x
   x = 1,962,548,828,100/640,191
6. Step 6: Final answer
   x = 3,065,567.66