Finding the Third Proportional to 127,120.50 and 279,630

Step by Step Solution

1. Step 1: Write the proportion equation
   127,120.50 : 279,630 = 279,630 : x
2. Step 2: Convert to fraction form
   127,120.50/279,630 = 279,630/x
3. Step 3: Cross multiply
   127,120.50x = 279,630 × 279,630
4. Step 4: Simplify right side
   127,120.50x = 78,192,936,900
5. Step 5: Solve for x
   x = 78,192,936,900/127,120.50
6. Step 6: Final answer
   x = 615,108.79