Finding the Third Proportional to 10,631.25 and 15,217.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,631.25 : 15,217.88 = 15,217.88 : x
2. Step 2: Convert to fraction form
   10,631.25/15,217.88 = 15,217.88/x
3. Step 3: Cross multiply
   10,631.25x = 15,217.88 × 15,217.88
4. Step 4: Simplify right side
   10,631.25x = 231,583,719.52
5. Step 5: Solve for x
   x = 231,583,719.52/10,631.25
6. Step 6: Final answer
   x = 21,783.30