Finding the Third Proportional to 4,038,216 and 8,636,736

Step by Step Solution

1. Step 1: Write the proportion equation
   4,038,216 : 8,636,736 = 8,636,736 : x
2. Step 2: Convert to fraction form
   4,038,216/8,636,736 = 8,636,736/x
3. Step 3: Cross multiply
   4,038,216x = 8,636,736 × 8,636,736
4. Step 4: Simplify right side
   4,038,216x = 74,593,208,733,696
5. Step 5: Solve for x
   x = 74,593,208,733,696/4,038,216
6. Step 6: Final answer
   x = 18,471,822.39