Finding the Third Proportional to 5,515.25 and 10,472.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,515.25 : 10,472.50 = 10,472.50 : x
2. Step 2: Convert to fraction form
   5,515.25/10,472.50 = 10,472.50/x
3. Step 3: Cross multiply
   5,515.25x = 10,472.50 × 10,472.50
4. Step 4: Simplify right side
   5,515.25x = 109,673,256.25
5. Step 5: Solve for x
   x = 109,673,256.25/5,515.25
6. Step 6: Final answer
   x = 19,885.46