Finding the Third Proportional to 20,729,554 and 42,786,858

Step by Step Solution

1. Step 1: Write the proportion equation
   20,729,554 : 42,786,858 = 42,786,858 : x
2. Step 2: Convert to fraction form
   20,729,554/42,786,858 = 42,786,858/x
3. Step 3: Cross multiply
   20,729,554x = 42,786,858 × 42,786,858
4. Step 4: Simplify right side
   20,729,554x = 1,830,715,217,512,164
5. Step 5: Solve for x
   x = 1,830,715,217,512,164/20,729,554
6. Step 6: Final answer
   x = 88,314,259.80