Finding the Third Proportional to 21,515.25 and 28,984.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,515.25 : 28,984.50 = 28,984.50 : x
2. Step 2: Convert to fraction form
   21,515.25/28,984.50 = 28,984.50/x
3. Step 3: Cross multiply
   21,515.25x = 28,984.50 × 28,984.50
4. Step 4: Simplify right side
   21,515.25x = 840,101,240.25
5. Step 5: Solve for x
   x = 840,101,240.25/21,515.25
6. Step 6: Final answer
   x = 39,046.78