Finding the Third Proportional to 642,124 and 1,406,048

Step by Step Solution

1. Step 1: Write the proportion equation
   642,124 : 1,406,048 = 1,406,048 : x
2. Step 2: Convert to fraction form
   642,124/1,406,048 = 1,406,048/x
3. Step 3: Cross multiply
   642,124x = 1,406,048 × 1,406,048
4. Step 4: Simplify right side
   642,124x = 1,976,970,978,304
5. Step 5: Solve for x
   x = 1,976,970,978,304/642,124
6. Step 6: Final answer
   x = 3,078,799.39