Finding the Third Proportional to 131,665.50 and 279,018

Step by Step Solution

1. Step 1: Write the proportion equation
   131,665.50 : 279,018 = 279,018 : x
2. Step 2: Convert to fraction form
   131,665.50/279,018 = 279,018/x
3. Step 3: Cross multiply
   131,665.50x = 279,018 × 279,018
4. Step 4: Simplify right side
   131,665.50x = 77,851,044,324
5. Step 5: Solve for x
   x = 77,851,044,324/131,665.50
6. Step 6: Final answer
   x = 591,278.99