Finding the Third Proportional to 85,970 and 131,499

Step by Step Solution

1. Step 1: Write the proportion equation
   85,970 : 131,499 = 131,499 : x
2. Step 2: Convert to fraction form
   85,970/131,499 = 131,499/x
3. Step 3: Cross multiply
   85,970x = 131,499 × 131,499
4. Step 4: Simplify right side
   85,970x = 17,291,987,001
5. Step 5: Solve for x
   x = 17,291,987,001/85,970
6. Step 6: Final answer
   x = 201,139.78