Finding the Third Proportional to 31,170 and 50,139

Step by Step Solution

1. Step 1: Write the proportion equation
   31,170 : 50,139 = 50,139 : x
2. Step 2: Convert to fraction form
   31,170/50,139 = 50,139/x
3. Step 3: Cross multiply
   31,170x = 50,139 × 50,139
4. Step 4: Simplify right side
   31,170x = 2,513,919,321
5. Step 5: Solve for x
   x = 2,513,919,321/31,170
6. Step 6: Final answer
   x = 80,651.89