Finding the Third Proportional to 28,209.75 and 43,821.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,209.75 : 43,821.50 = 43,821.50 : x
2. Step 2: Convert to fraction form
   28,209.75/43,821.50 = 43,821.50/x
3. Step 3: Cross multiply
   28,209.75x = 43,821.50 × 43,821.50
4. Step 4: Simplify right side
   28,209.75x = 1,920,323,862.25
5. Step 5: Solve for x
   x = 1,920,323,862.25/28,209.75
6. Step 6: Final answer
   x = 68,073.05