Finding the Third Proportional to 686,909 and 1,492,099

Step by Step Solution

1. Step 1: Write the proportion equation
   686,909 : 1,492,099 = 1,492,099 : x
2. Step 2: Convert to fraction form
   686,909/1,492,099 = 1,492,099/x
3. Step 3: Cross multiply
   686,909x = 1,492,099 × 1,492,099
4. Step 4: Simplify right side
   686,909x = 2,226,359,425,801
5. Step 5: Solve for x
   x = 2,226,359,425,801/686,909
6. Step 6: Final answer
   x = 3,241,127.17