Finding the Third Proportional to 9,440 and 13,215

Step by Step Solution

1. Step 1: Write the proportion equation
   9,440 : 13,215 = 13,215 : x
2. Step 2: Convert to fraction form
   9,440/13,215 = 13,215/x
3. Step 3: Cross multiply
   9,440x = 13,215 × 13,215
4. Step 4: Simplify right side
   9,440x = 174,636,225
5. Step 5: Solve for x
   x = 174,636,225/9,440
6. Step 6: Final answer
   x = 18,499.60