Finding the Third Proportional to 20,387.32 and 31,189.43

Step by Step Solution

1. Step 1: Write the proportion equation
   20,387.32 : 31,189.43 = 31,189.43 : x
2. Step 2: Convert to fraction form
   20,387.32/31,189.43 = 31,189.43/x
3. Step 3: Cross multiply
   20,387.32x = 31,189.43 × 31,189.43
4. Step 4: Simplify right side
   20,387.32x = 972,780,524.23
5. Step 5: Solve for x
   x = 972,780,524.23/20,387.32
6. Step 6: Final answer
   x = 47,714.98