Finding the Third Proportional to 640,528 and 1,401,440

Step by Step Solution

1. Step 1: Write the proportion equation
   640,528 : 1,401,440 = 1,401,440 : x
2. Step 2: Convert to fraction form
   640,528/1,401,440 = 1,401,440/x
3. Step 3: Cross multiply
   640,528x = 1,401,440 × 1,401,440
4. Step 4: Simplify right side
   640,528x = 1,964,034,073,600
5. Step 5: Solve for x
   x = 1,964,034,073,600/640,528
6. Step 6: Final answer
   x = 3,066,273.56