Finding the Third Proportional to 31,440.38 and 67,379.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,440.38 : 67,379.63 = 67,379.63 : x
2. Step 2: Convert to fraction form
   31,440.38/67,379.63 = 67,379.63/x
3. Step 3: Cross multiply
   31,440.38x = 67,379.63 × 67,379.63
4. Step 4: Simplify right side
   31,440.38x = 4,540,013,865.14
5. Step 5: Solve for x
   x = 4,540,013,865.14/31,440.38
6. Step 6: Final answer
   x = 144,400.75