Finding the Third Proportional to 131,856 and 288,720

Step by Step Solution

1. Step 1: Write the proportion equation
   131,856 : 288,720 = 288,720 : x
2. Step 2: Convert to fraction form
   131,856/288,720 = 288,720/x
3. Step 3: Cross multiply
   131,856x = 288,720 × 288,720
4. Step 4: Simplify right side
   131,856x = 83,359,238,400
5. Step 5: Solve for x
   x = 83,359,238,400/131,856
6. Step 6: Final answer
   x = 632,199.05