Finding the Third Proportional to 13,920.38 and 21,587.81

Step by Step Solution

1. Step 1: Write the proportion equation
   13,920.38 : 21,587.81 = 21,587.81 : x
2. Step 2: Convert to fraction form
   13,920.38/21,587.81 = 21,587.81/x
3. Step 3: Cross multiply
   13,920.38x = 21,587.81 × 21,587.81
4. Step 4: Simplify right side
   13,920.38x = 466,033,648.54
5. Step 5: Solve for x
   x = 466,033,648.54/13,920.38
6. Step 6: Final answer
   x = 33,478.53