Finding the Third Proportional to 8,503,185 and 12,912,243

Step by Step Solution

1. Step 1: Write the proportion equation
   8,503,185 : 12,912,243 = 12,912,243 : x
2. Step 2: Convert to fraction form
   8,503,185/12,912,243 = 12,912,243/x
3. Step 3: Cross multiply
   8,503,185x = 12,912,243 × 12,912,243
4. Step 4: Simplify right side
   8,503,185x = 166,726,019,291,049
5. Step 5: Solve for x
   x = 166,726,019,291,049/8,503,185
6. Step 6: Final answer
   x = 19,607,478.76