Finding the Third Proportional to 8,478 and 12,332.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,478 : 12,332.25 = 12,332.25 : x
2. Step 2: Convert to fraction form
   8,478/12,332.25 = 12,332.25/x
3. Step 3: Cross multiply
   8,478x = 12,332.25 × 12,332.25
4. Step 4: Simplify right side
   8,478x = 152,084,390.06
5. Step 5: Solve for x
   x = 152,084,390.06/8,478
6. Step 6: Final answer
   x = 17,938.71