Finding the Third Proportional to 20,146.50 and 28,320.75

Step by Step Solution

1. Step 1: Write the proportion equation
   20,146.50 : 28,320.75 = 28,320.75 : x
2. Step 2: Convert to fraction form
   20,146.50/28,320.75 = 28,320.75/x
3. Step 3: Cross multiply
   20,146.50x = 28,320.75 × 28,320.75
4. Step 4: Simplify right side
   20,146.50x = 802,064,880.56
5. Step 5: Solve for x
   x = 802,064,880.56/20,146.50
6. Step 6: Final answer
   x = 39,811.62