Finding the Third Proportional to 1,489,430 and 3,188,812

Step by Step Solution

1. Step 1: Write the proportion equation
   1,489,430 : 3,188,812 = 3,188,812 : x
2. Step 2: Convert to fraction form
   1,489,430/3,188,812 = 3,188,812/x
3. Step 3: Cross multiply
   1,489,430x = 3,188,812 × 3,188,812
4. Step 4: Simplify right side
   1,489,430x = 10,168,521,971,344
5. Step 5: Solve for x
   x = 10,168,521,971,344/1,489,430
6. Step 6: Final answer
   x = 6,827,123.11