Finding the Third Proportional to 9,920.25 and 13,472.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920.25 : 13,472.88 = 13,472.88 : x
2. Step 2: Convert to fraction form
   9,920.25/13,472.88 = 13,472.88/x
3. Step 3: Cross multiply
   9,920.25x = 13,472.88 × 13,472.88
4. Step 4: Simplify right side
   9,920.25x = 181,518,360.77
5. Step 5: Solve for x
   x = 181,518,360.77/9,920.25
6. Step 6: Final answer
   x = 18,297.76