Finding the Third Proportional to 3,908,268 and 8,611,630

Step by Step Solution

1. Step 1: Write the proportion equation
   3,908,268 : 8,611,630 = 8,611,630 : x
2. Step 2: Convert to fraction form
   3,908,268/8,611,630 = 8,611,630/x
3. Step 3: Cross multiply
   3,908,268x = 8,611,630 × 8,611,630
4. Step 4: Simplify right side
   3,908,268x = 74,160,171,256,900
5. Step 5: Solve for x
   x = 74,160,171,256,900/3,908,268
6. Step 6: Final answer
   x = 18,975,201.10