Finding the Third Proportional to 3,954,684 and 8,634,264

Step by Step Solution

1. Step 1: Write the proportion equation
   3,954,684 : 8,634,264 = 8,634,264 : x
2. Step 2: Convert to fraction form
   3,954,684/8,634,264 = 8,634,264/x
3. Step 3: Cross multiply
   3,954,684x = 8,634,264 × 8,634,264
4. Step 4: Simplify right side
   3,954,684x = 74,550,514,821,696
5. Step 5: Solve for x
   x = 74,550,514,821,696/3,954,684
6. Step 6: Final answer
   x = 18,851,193.88