Finding the Third Proportional to 4,222,420 and 9,108,392

Step by Step Solution

1. Step 1: Write the proportion equation
   4,222,420 : 9,108,392 = 9,108,392 : x
2. Step 2: Convert to fraction form
   4,222,420/9,108,392 = 9,108,392/x
3. Step 3: Cross multiply
   4,222,420x = 9,108,392 × 9,108,392
4. Step 4: Simplify right side
   4,222,420x = 82,962,804,825,664
5. Step 5: Solve for x
   x = 82,962,804,825,664/4,222,420
6. Step 6: Final answer
   x = 19,648,164.99