Finding the Third Proportional to 20,890 and 31,375.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,890 : 31,375.50 = 31,375.50 : x
2. Step 2: Convert to fraction form
   20,890/31,375.50 = 31,375.50/x
3. Step 3: Cross multiply
   20,890x = 31,375.50 × 31,375.50
4. Step 4: Simplify right side
   20,890x = 984,422,000.25
5. Step 5: Solve for x
   x = 984,422,000.25/20,890
6. Step 6: Final answer
   x = 47,124.08