Finding the Third Proportional to 3,835,143 and 8,521,605

Step by Step Solution

1. Step 1: Write the proportion equation
   3,835,143 : 8,521,605 = 8,521,605 : x
2. Step 2: Convert to fraction form
   3,835,143/8,521,605 = 8,521,605/x
3. Step 3: Cross multiply
   3,835,143x = 8,521,605 × 8,521,605
4. Step 4: Simplify right side
   3,835,143x = 72,617,751,776,025
5. Step 5: Solve for x
   x = 72,617,751,776,025/3,835,143
6. Step 6: Final answer
   x = 18,934,822.45