Finding the Third Proportional to 646,468 and 1,406,872

Step by Step Solution

1. Step 1: Write the proportion equation
   646,468 : 1,406,872 = 1,406,872 : x
2. Step 2: Convert to fraction form
   646,468/1,406,872 = 1,406,872/x
3. Step 3: Cross multiply
   646,468x = 1,406,872 × 1,406,872
4. Step 4: Simplify right side
   646,468x = 1,979,288,824,384
5. Step 5: Solve for x
   x = 1,979,288,824,384/646,468
6. Step 6: Final answer
   x = 3,061,696.52