Finding the Third Proportional to 127,188 and 279,800

Step by Step Solution

1. Step 1: Write the proportion equation
   127,188 : 279,800 = 279,800 : x
2. Step 2: Convert to fraction form
   127,188/279,800 = 279,800/x
3. Step 3: Cross multiply
   127,188x = 279,800 × 279,800
4. Step 4: Simplify right side
   127,188x = 78,288,040,000
5. Step 5: Solve for x
   x = 78,288,040,000/127,188
6. Step 6: Final answer
   x = 615,530.08