Finding the Third Proportional to 31,438.13 and 39,745.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,438.13 : 39,745.69 = 39,745.69 : x
2. Step 2: Convert to fraction form
   31,438.13/39,745.69 = 39,745.69/x
3. Step 3: Cross multiply
   31,438.13x = 39,745.69 × 39,745.69
4. Step 4: Simplify right side
   31,438.13x = 1,579,719,674.85
5. Step 5: Solve for x
   x = 1,579,719,674.85/31,438.13
6. Step 6: Final answer
   x = 50,248.53