Finding the Third Proportional to 5,167.55 and 10,640.74

Step by Step Solution

1. Step 1: Write the proportion equation
   5,167.55 : 10,640.74 = 10,640.74 : x
2. Step 2: Convert to fraction form
   5,167.55/10,640.74 = 10,640.74/x
3. Step 3: Cross multiply
   5,167.55x = 10,640.74 × 10,640.74
4. Step 4: Simplify right side
   5,167.55x = 113,225,394.30
5. Step 5: Solve for x
   x = 113,225,394.30/5,167.55
6. Step 6: Final answer
   x = 21,910.86