Finding the Third Proportional to 118,460 and 279,644

Step by Step Solution

1. Step 1: Write the proportion equation
   118,460 : 279,644 = 279,644 : x
2. Step 2: Convert to fraction form
   118,460/279,644 = 279,644/x
3. Step 3: Cross multiply
   118,460x = 279,644 × 279,644
4. Step 4: Simplify right side
   118,460x = 78,200,766,736
5. Step 5: Solve for x
   x = 78,200,766,736/118,460
6. Step 6: Final answer
   x = 660,144.92