Finding the Third Proportional to 3,908,109 and 8,484,654

Step by Step Solution

1. Step 1: Write the proportion equation
   3,908,109 : 8,484,654 = 8,484,654 : x
2. Step 2: Convert to fraction form
   3,908,109/8,484,654 = 8,484,654/x
3. Step 3: Cross multiply
   3,908,109x = 8,484,654 × 8,484,654
4. Step 4: Simplify right side
   3,908,109x = 71,989,353,499,716
5. Step 5: Solve for x
   x = 71,989,353,499,716/3,908,109
6. Step 6: Final answer
   x = 18,420,508.10