Finding the Third Proportional to 4,042,134 and 8,644,356

Step by Step Solution

1. Step 1: Write the proportion equation
   4,042,134 : 8,644,356 = 8,644,356 : x
2. Step 2: Convert to fraction form
   4,042,134/8,644,356 = 8,644,356/x
3. Step 3: Cross multiply
   4,042,134x = 8,644,356 × 8,644,356
4. Step 4: Simplify right side
   4,042,134x = 74,724,890,654,736
5. Step 5: Solve for x
   x = 74,724,890,654,736/4,042,134
6. Step 6: Final answer
   x = 18,486,495.17