Finding the Third Proportional to 4,597,705 and 9,991,238

Step by Step Solution

1. Step 1: Write the proportion equation
   4,597,705 : 9,991,238 = 9,991,238 : x
2. Step 2: Convert to fraction form
   4,597,705/9,991,238 = 9,991,238/x
3. Step 3: Cross multiply
   4,597,705x = 9,991,238 × 9,991,238
4. Step 4: Simplify right side
   4,597,705x = 99,824,836,772,644
5. Step 5: Solve for x
   x = 99,824,836,772,644/4,597,705
6. Step 6: Final answer
   x = 21,711,883.81