Finding the Third Proportional to 2,161,336 and 3,390,378

Step by Step Solution

1. Step 1: Write the proportion equation
   2,161,336 : 3,390,378 = 3,390,378 : x
2. Step 2: Convert to fraction form
   2,161,336/3,390,378 = 3,390,378/x
3. Step 3: Cross multiply
   2,161,336x = 3,390,378 × 3,390,378
4. Step 4: Simplify right side
   2,161,336x = 11,494,662,982,884
5. Step 5: Solve for x
   x = 11,494,662,982,884/2,161,336
6. Step 6: Final answer
   x = 5,318,313.76