Finding the Third Proportional to 646,586 and 1,405,092

Step by Step Solution

1. Step 1: Write the proportion equation
   646,586 : 1,405,092 = 1,405,092 : x
2. Step 2: Convert to fraction form
   646,586/1,405,092 = 1,405,092/x
3. Step 3: Cross multiply
   646,586x = 1,405,092 × 1,405,092
4. Step 4: Simplify right side
   646,586x = 1,974,283,528,464
5. Step 5: Solve for x
   x = 1,974,283,528,464/646,586
6. Step 6: Final answer
   x = 3,053,396.65