Finding the Third Proportional to 20,990.25 and 31,927.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,990.25 : 31,927.50 = 31,927.50 : x
2. Step 2: Convert to fraction form
   20,990.25/31,927.50 = 31,927.50/x
3. Step 3: Cross multiply
   20,990.25x = 31,927.50 × 31,927.50
4. Step 4: Simplify right side
   20,990.25x = 1,019,365,256.25
5. Step 5: Solve for x
   x = 1,019,365,256.25/20,990.25
6. Step 6: Final answer
   x = 48,563.75