Finding the Third Proportional to 13,419 and 21,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,419 : 21,280.50 = 21,280.50 : x
2. Step 2: Convert to fraction form
   13,419/21,280.50 = 21,280.50/x
3. Step 3: Cross multiply
   13,419x = 21,280.50 × 21,280.50
4. Step 4: Simplify right side
   13,419x = 452,859,680.25
5. Step 5: Solve for x
   x = 452,859,680.25/13,419
6. Step 6: Final answer
   x = 33,747.65