Finding the Third Proportional to 3,974,442 and 8,578,377

Step by Step Solution

1. Step 1: Write the proportion equation
   3,974,442 : 8,578,377 = 8,578,377 : x
2. Step 2: Convert to fraction form
   3,974,442/8,578,377 = 8,578,377/x
3. Step 3: Cross multiply
   3,974,442x = 8,578,377 × 8,578,377
4. Step 4: Simplify right side
   3,974,442x = 73,588,551,954,129
5. Step 5: Solve for x
   x = 73,588,551,954,129/3,974,442
6. Step 6: Final answer
   x = 18,515,442.41