Finding the Third Proportional to 15,917.81 and 21,540.94

Step by Step Solution

1. Step 1: Write the proportion equation
   15,917.81 : 21,540.94 = 21,540.94 : x
2. Step 2: Convert to fraction form
   15,917.81/21,540.94 = 21,540.94/x
3. Step 3: Cross multiply
   15,917.81x = 21,540.94 × 21,540.94
4. Step 4: Simplify right side
   15,917.81x = 464,011,988.38
5. Step 5: Solve for x
   x = 464,011,988.38/15,917.81
6. Step 6: Final answer
   x = 29,150.49