Finding the Third Proportional to 4,040,358 and 8,721,648

Step by Step Solution

1. Step 1: Write the proportion equation
   4,040,358 : 8,721,648 = 8,721,648 : x
2. Step 2: Convert to fraction form
   4,040,358/8,721,648 = 8,721,648/x
3. Step 3: Cross multiply
   4,040,358x = 8,721,648 × 8,721,648
4. Step 4: Simplify right side
   4,040,358x = 76,067,143,835,904
5. Step 5: Solve for x
   x = 76,067,143,835,904/4,040,358
6. Step 6: Final answer
   x = 18,826,832.63