Finding the Third Proportional to 129,634 and 279,500

Step by Step Solution

1. Step 1: Write the proportion equation
   129,634 : 279,500 = 279,500 : x
2. Step 2: Convert to fraction form
   129,634/279,500 = 279,500/x
3. Step 3: Cross multiply
   129,634x = 279,500 × 279,500
4. Step 4: Simplify right side
   129,634x = 78,120,250,000
5. Step 5: Solve for x
   x = 78,120,250,000/129,634
6. Step 6: Final answer
   x = 602,621.61