Finding the Third Proportional to 1,035,638 and 1,399,215

Step by Step Solution

1. Step 1: Write the proportion equation
   1,035,638 : 1,399,215 = 1,399,215 : x
2. Step 2: Convert to fraction form
   1,035,638/1,399,215 = 1,399,215/x
3. Step 3: Cross multiply
   1,035,638x = 1,399,215 × 1,399,215
4. Step 4: Simplify right side
   1,035,638x = 1,957,802,616,225
5. Step 5: Solve for x
   x = 1,957,802,616,225/1,035,638
6. Step 6: Final answer
   x = 1,890,431.42