Finding the Third Proportional to 20,391.75 and 28,876.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,391.75 : 28,876.50 = 28,876.50 : x
2. Step 2: Convert to fraction form
   20,391.75/28,876.50 = 28,876.50/x
3. Step 3: Cross multiply
   20,391.75x = 28,876.50 × 28,876.50
4. Step 4: Simplify right side
   20,391.75x = 833,852,252.25
5. Step 5: Solve for x
   x = 833,852,252.25/20,391.75
6. Step 6: Final answer
   x = 40,891.65