Finding the Third Proportional to 637,447 and 1,390,805

Step by Step Solution

1. Step 1: Write the proportion equation
   637,447 : 1,390,805 = 1,390,805 : x
2. Step 2: Convert to fraction form
   637,447/1,390,805 = 1,390,805/x
3. Step 3: Cross multiply
   637,447x = 1,390,805 × 1,390,805
4. Step 4: Simplify right side
   637,447x = 1,934,338,548,025
5. Step 5: Solve for x
   x = 1,934,338,548,025/637,447
6. Step 6: Final answer
   x = 3,034,508.83