Finding the Third Proportional to 3,817,181 and 8,320,243

Step by Step Solution

1. Step 1: Write the proportion equation
   3,817,181 : 8,320,243 = 8,320,243 : x
2. Step 2: Convert to fraction form
   3,817,181/8,320,243 = 8,320,243/x
3. Step 3: Cross multiply
   3,817,181x = 8,320,243 × 8,320,243
4. Step 4: Simplify right side
   3,817,181x = 69,226,443,579,049
5. Step 5: Solve for x
   x = 69,226,443,579,049/3,817,181
6. Step 6: Final answer
   x = 18,135,488.88