Finding the Third Proportional to 642,692 and 1,399,816

Step by Step Solution

1. Step 1: Write the proportion equation
   642,692 : 1,399,816 = 1,399,816 : x
2. Step 2: Convert to fraction form
   642,692/1,399,816 = 1,399,816/x
3. Step 3: Cross multiply
   642,692x = 1,399,816 × 1,399,816
4. Step 4: Simplify right side
   642,692x = 1,959,484,833,856
5. Step 5: Solve for x
   x = 1,959,484,833,856/642,692
6. Step 6: Final answer
   x = 3,048,870.74