Finding the Third Proportional to 131,312 and 288,864

Step by Step Solution

1. Step 1: Write the proportion equation
   131,312 : 288,864 = 288,864 : x
2. Step 2: Convert to fraction form
   131,312/288,864 = 288,864/x
3. Step 3: Cross multiply
   131,312x = 288,864 × 288,864
4. Step 4: Simplify right side
   131,312x = 83,442,410,496
5. Step 5: Solve for x
   x = 83,442,410,496/131,312
6. Step 6: Final answer
   x = 635,451.52