Finding the Third Proportional to 20,643.38 and 31,631.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,643.38 : 31,631.25 = 31,631.25 : x
2. Step 2: Convert to fraction form
   20,643.38/31,631.25 = 31,631.25/x
3. Step 3: Cross multiply
   20,643.38x = 31,631.25 × 31,631.25
4. Step 4: Simplify right side
   20,643.38x = 1,000,535,976.56
5. Step 5: Solve for x
   x = 1,000,535,976.56/20,643.38
6. Step 6: Final answer
   x = 48,467.65