Finding the Third Proportional to 3,908,222 and 8,611,540

Step by Step Solution

1. Step 1: Write the proportion equation
   3,908,222 : 8,611,540 = 8,611,540 : x
2. Step 2: Convert to fraction form
   3,908,222/8,611,540 = 8,611,540/x
3. Step 3: Cross multiply
   3,908,222x = 8,611,540 × 8,611,540
4. Step 4: Simplify right side
   3,908,222x = 74,158,621,171,600
5. Step 5: Solve for x
   x = 74,158,621,171,600/3,908,222
6. Step 6: Final answer
   x = 18,975,027.82