Finding the Third Proportional to 3,390,446 and 5,120,231

Step by Step Solution

1. Step 1: Write the proportion equation
   3,390,446 : 5,120,231 = 5,120,231 : x
2. Step 2: Convert to fraction form
   3,390,446/5,120,231 = 5,120,231/x
3. Step 3: Cross multiply
   3,390,446x = 5,120,231 × 5,120,231
4. Step 4: Simplify right side
   3,390,446x = 26,216,765,493,361
5. Step 5: Solve for x
   x = 26,216,765,493,361/3,390,446
6. Step 6: Final answer
   x = 7,732,541.82