Finding the Third Proportional to 13,908 and 21,328.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,908 : 21,328.50 = 21,328.50 : x
2. Step 2: Convert to fraction form
   13,908/21,328.50 = 21,328.50/x
3. Step 3: Cross multiply
   13,908x = 21,328.50 × 21,328.50
4. Step 4: Simplify right side
   13,908x = 454,904,912.25
5. Step 5: Solve for x
   x = 454,904,912.25/13,908
6. Step 6: Final answer
   x = 32,708.15