Finding the Third Proportional to 4,198,478 and 9,156,662

Step by Step Solution

1. Step 1: Write the proportion equation
   4,198,478 : 9,156,662 = 9,156,662 : x
2. Step 2: Convert to fraction form
   4,198,478/9,156,662 = 9,156,662/x
3. Step 3: Cross multiply
   4,198,478x = 9,156,662 × 9,156,662
4. Step 4: Simplify right side
   4,198,478x = 83,844,458,982,244
5. Step 5: Solve for x
   x = 83,844,458,982,244/4,198,478
6. Step 6: Final answer
   x = 19,970,203.25