Finding the Third Proportional to 4,597,664 and 9,991,160

Step by Step Solution

1. Step 1: Write the proportion equation
   4,597,664 : 9,991,160 = 9,991,160 : x
2. Step 2: Convert to fraction form
   4,597,664/9,991,160 = 9,991,160/x
3. Step 3: Cross multiply
   4,597,664x = 9,991,160 × 9,991,160
4. Step 4: Simplify right side
   4,597,664x = 99,823,278,145,600
5. Step 5: Solve for x
   x = 99,823,278,145,600/4,597,664
6. Step 6: Final answer
   x = 21,711,738.43