Finding the Third Proportional to 4,638,804 and 9,408,040

Step by Step Solution

1. Step 1: Write the proportion equation
   4,638,804 : 9,408,040 = 9,408,040 : x
2. Step 2: Convert to fraction form
   4,638,804/9,408,040 = 9,408,040/x
3. Step 3: Cross multiply
   4,638,804x = 9,408,040 × 9,408,040
4. Step 4: Simplify right side
   4,638,804x = 88,511,216,641,600
5. Step 5: Solve for x
   x = 88,511,216,641,600/4,638,804
6. Step 6: Final answer
   x = 19,080,611.43