Finding the Third Proportional to 4,597,706 and 9,991,240

Step by Step Solution

1. Step 1: Write the proportion equation
   4,597,706 : 9,991,240 = 9,991,240 : x
2. Step 2: Convert to fraction form
   4,597,706/9,991,240 = 9,991,240/x
3. Step 3: Cross multiply
   4,597,706x = 9,991,240 × 9,991,240
4. Step 4: Simplify right side
   4,597,706x = 99,824,876,737,600
5. Step 5: Solve for x
   x = 99,824,876,737,600/4,597,706
6. Step 6: Final answer
   x = 21,711,887.78