Finding the Third Proportional to 869,619 and 1,300,431

Step by Step Solution

1. Step 1: Write the proportion equation
   869,619 : 1,300,431 = 1,300,431 : x
2. Step 2: Convert to fraction form
   869,619/1,300,431 = 1,300,431/x
3. Step 3: Cross multiply
   869,619x = 1,300,431 × 1,300,431
4. Step 4: Simplify right side
   869,619x = 1,691,120,785,761
5. Step 5: Solve for x
   x = 1,691,120,785,761/869,619
6. Step 6: Final answer
   x = 1,944,668.63