Finding the Third Proportional to 3,886,760 and 8,538,736

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886,760 : 8,538,736 = 8,538,736 : x
2. Step 2: Convert to fraction form
   3,886,760/8,538,736 = 8,538,736/x
3. Step 3: Cross multiply
   3,886,760x = 8,538,736 × 8,538,736
4. Step 4: Simplify right side
   3,886,760x = 72,910,012,477,696
5. Step 5: Solve for x
   x = 72,910,012,477,696/3,886,760
6. Step 6: Final answer
   x = 18,758,557.89