Finding the Third Proportional to 21,687.75 and 31,789.13

Step by Step Solution

1. Step 1: Write the proportion equation
   21,687.75 : 31,789.13 = 31,789.13 : x
2. Step 2: Convert to fraction form
   21,687.75/31,789.13 = 31,789.13/x
3. Step 3: Cross multiply
   21,687.75x = 31,789.13 × 31,789.13
4. Step 4: Simplify right side
   21,687.75x = 1,010,548,468.27
5. Step 5: Solve for x
   x = 1,010,548,468.27/21,687.75
6. Step 6: Final answer
   x = 46,595.36