Finding the Third Proportional to 915,642 and 1,400,679

Step by Step Solution

1. Step 1: Write the proportion equation
   915,642 : 1,400,679 = 1,400,679 : x
2. Step 2: Convert to fraction form
   915,642/1,400,679 = 1,400,679/x
3. Step 3: Cross multiply
   915,642x = 1,400,679 × 1,400,679
4. Step 4: Simplify right side
   915,642x = 1,961,901,661,041
5. Step 5: Solve for x
   x = 1,961,901,661,041/915,642
6. Step 6: Final answer
   x = 2,142,651.45