Finding the Third Proportional to 4,239,810 and 9,420,003

Step by Step Solution

1. Step 1: Write the proportion equation
   4,239,810 : 9,420,003 = 9,420,003 : x
2. Step 2: Convert to fraction form
   4,239,810/9,420,003 = 9,420,003/x
3. Step 3: Cross multiply
   4,239,810x = 9,420,003 × 9,420,003
4. Step 4: Simplify right side
   4,239,810x = 88,736,456,520,009
5. Step 5: Solve for x
   x = 88,736,456,520,009/4,239,810
6. Step 6: Final answer
   x = 20,929,347.43