Finding the Third Proportional to 642,786 and 1,411,665

Step by Step Solution

1. Step 1: Write the proportion equation
   642,786 : 1,411,665 = 1,411,665 : x
2. Step 2: Convert to fraction form
   642,786/1,411,665 = 1,411,665/x
3. Step 3: Cross multiply
   642,786x = 1,411,665 × 1,411,665
4. Step 4: Simplify right side
   642,786x = 1,992,798,072,225
5. Step 5: Solve for x
   x = 1,992,798,072,225/642,786
6. Step 6: Final answer
   x = 3,100,251.21