Finding the Third Proportional to 20,388.75 and 31,511.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,388.75 : 31,511.25 = 31,511.25 : x
2. Step 2: Convert to fraction form
   20,388.75/31,511.25 = 31,511.25/x
3. Step 3: Cross multiply
   20,388.75x = 31,511.25 × 31,511.25
4. Step 4: Simplify right side
   20,388.75x = 992,958,876.56
5. Step 5: Solve for x
   x = 992,958,876.56/20,388.75
6. Step 6: Final answer
   x = 48,701.31