Finding the Third Proportional to 129,818 and 269,500

Step by Step Solution

1. Step 1: Write the proportion equation
   129,818 : 269,500 = 269,500 : x
2. Step 2: Convert to fraction form
   129,818/269,500 = 269,500/x
3. Step 3: Cross multiply
   129,818x = 269,500 × 269,500
4. Step 4: Simplify right side
   129,818x = 72,630,250,000
5. Step 5: Solve for x
   x = 72,630,250,000/129,818
6. Step 6: Final answer
   x = 559,477.50