Finding the Third Proportional to 20,828,988 and 42,672,744

Step by Step Solution

1. Step 1: Write the proportion equation
   20,828,988 : 42,672,744 = 42,672,744 : x
2. Step 2: Convert to fraction form
   20,828,988/42,672,744 = 42,672,744/x
3. Step 3: Cross multiply
   20,828,988x = 42,672,744 × 42,672,744
4. Step 4: Simplify right side
   20,828,988x = 1,820,963,080,489,536
5. Step 5: Solve for x
   x = 1,820,963,080,489,536/20,828,988
6. Step 6: Final answer
   x = 87,424,462.51