Finding the Third Proportional to 118,582.50 and 279,918

Step by Step Solution

1. Step 1: Write the proportion equation
   118,582.50 : 279,918 = 279,918 : x
2. Step 2: Convert to fraction form
   118,582.50/279,918 = 279,918/x
3. Step 3: Cross multiply
   118,582.50x = 279,918 × 279,918
4. Step 4: Simplify right side
   118,582.50x = 78,354,086,724
5. Step 5: Solve for x
   x = 78,354,086,724/118,582.50
6. Step 6: Final answer
   x = 660,755.90