Finding the Third Proportional to 3,886,680 and 8,538,576

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886,680 : 8,538,576 = 8,538,576 : x
2. Step 2: Convert to fraction form
   3,886,680/8,538,576 = 8,538,576/x
3. Step 3: Cross multiply
   3,886,680x = 8,538,576 × 8,538,576
4. Step 4: Simplify right side
   3,886,680x = 72,907,280,107,776
5. Step 5: Solve for x
   x = 72,907,280,107,776/3,886,680
6. Step 6: Final answer
   x = 18,758,240.99