Finding the Third Proportional to 21,676.36 and 40,231.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,676.36 : 40,231.69 = 40,231.69 : x
2. Step 2: Convert to fraction form
   21,676.36/40,231.69 = 40,231.69/x
3. Step 3: Cross multiply
   21,676.36x = 40,231.69 × 40,231.69
4. Step 4: Simplify right side
   21,676.36x = 1,618,588,679.10
5. Step 5: Solve for x
   x = 1,618,588,679.10/21,676.36
6. Step 6: Final answer
   x = 74,670.69