Finding the Third Proportional to 20,486.50 and 31,276.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,486.50 : 31,276.50 = 31,276.50 : x
2. Step 2: Convert to fraction form
   20,486.50/31,276.50 = 31,276.50/x
3. Step 3: Cross multiply
   20,486.50x = 31,276.50 × 31,276.50
4. Step 4: Simplify right side
   20,486.50x = 978,219,452.25
5. Step 5: Solve for x
   x = 978,219,452.25/20,486.50
6. Step 6: Final answer
   x = 47,749.47