Finding the Third Proportional to 9,210 and 12,247.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,210 : 12,247.50 = 12,247.50 : x
2. Step 2: Convert to fraction form
   9,210/12,247.50 = 12,247.50/x
3. Step 3: Cross multiply
   9,210x = 12,247.50 × 12,247.50
4. Step 4: Simplify right side
   9,210x = 150,001,256.25
5. Step 5: Solve for x
   x = 150,001,256.25/9,210
6. Step 6: Final answer
   x = 16,286.78