Finding the Third Proportional to 21,066.96 and 31,540.64

Step by Step Solution

1. Step 1: Write the proportion equation
   21,066.96 : 31,540.64 = 31,540.64 : x
2. Step 2: Convert to fraction form
   21,066.96/31,540.64 = 31,540.64/x
3. Step 3: Cross multiply
   21,066.96x = 31,540.64 × 31,540.64
4. Step 4: Simplify right side
   21,066.96x = 994,812,011.04
5. Step 5: Solve for x
   x = 994,812,011.04/21,066.96
6. Step 6: Final answer
   x = 47,221.43