Finding the Third Proportional to 4,597,718 and 9,991,264

Step by Step Solution

1. Step 1: Write the proportion equation
   4,597,718 : 9,991,264 = 9,991,264 : x
2. Step 2: Convert to fraction form
   4,597,718/9,991,264 = 9,991,264/x
3. Step 3: Cross multiply
   4,597,718x = 9,991,264 × 9,991,264
4. Step 4: Simplify right side
   4,597,718x = 99,825,356,317,696
5. Step 5: Solve for x
   x = 99,825,356,317,696/4,597,718
6. Step 6: Final answer
   x = 21,711,935.42