Finding the Third Proportional to 131,320 and 288,170

Step by Step Solution

1. Step 1: Write the proportion equation
   131,320 : 288,170 = 288,170 : x
2. Step 2: Convert to fraction form
   131,320/288,170 = 288,170/x
3. Step 3: Cross multiply
   131,320x = 288,170 × 288,170
4. Step 4: Simplify right side
   131,320x = 83,041,948,900
5. Step 5: Solve for x
   x = 83,041,948,900/131,320
6. Step 6: Final answer
   x = 632,363.30