Finding the Third Proportional to 20,412 and 28,891.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,412 : 28,891.50 = 28,891.50 : x
2. Step 2: Convert to fraction form
   20,412/28,891.50 = 28,891.50/x
3. Step 3: Cross multiply
   20,412x = 28,891.50 × 28,891.50
4. Step 4: Simplify right side
   20,412x = 834,718,772.25
5. Step 5: Solve for x
   x = 834,718,772.25/20,412
6. Step 6: Final answer
   x = 40,893.53