Finding the Third Proportional to 131,367 and 288,978

Step by Step Solution

1. Step 1: Write the proportion equation
   131,367 : 288,978 = 288,978 : x
2. Step 2: Convert to fraction form
   131,367/288,978 = 288,978/x
3. Step 3: Cross multiply
   131,367x = 288,978 × 288,978
4. Step 4: Simplify right side
   131,367x = 83,508,284,484
5. Step 5: Solve for x
   x = 83,508,284,484/131,367
6. Step 6: Final answer
   x = 635,686.93