Finding the Third Proportional to 21,987 and 31,504.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,987 : 31,504.50 = 31,504.50 : x
2. Step 2: Convert to fraction form
   21,987/31,504.50 = 31,504.50/x
3. Step 3: Cross multiply
   21,987x = 31,504.50 × 31,504.50
4. Step 4: Simplify right side
   21,987x = 992,533,520.25
5. Step 5: Solve for x
   x = 992,533,520.25/21,987
6. Step 6: Final answer
   x = 45,141.83