Finding the Third Proportional to 8,478.25 and 12,472.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,478.25 : 12,472.25 = 12,472.25 : x
2. Step 2: Convert to fraction form
   8,478.25/12,472.25 = 12,472.25/x
3. Step 3: Cross multiply
   8,478.25x = 12,472.25 × 12,472.25
4. Step 4: Simplify right side
   8,478.25x = 155,557,020.06
5. Step 5: Solve for x
   x = 155,557,020.06/8,478.25
6. Step 6: Final answer
   x = 18,347.77