Finding the Third Proportional to 131,307 and 288,144

Step by Step Solution

1. Step 1: Write the proportion equation
   131,307 : 288,144 = 288,144 : x
2. Step 2: Convert to fraction form
   131,307/288,144 = 288,144/x
3. Step 3: Cross multiply
   131,307x = 288,144 × 288,144
4. Step 4: Simplify right side
   131,307x = 83,026,964,736
5. Step 5: Solve for x
   x = 83,026,964,736/131,307
6. Step 6: Final answer
   x = 632,311.79