Finding the Third Proportional to 131,520 and 287,646

Step by Step Solution

1. Step 1: Write the proportion equation
   131,520 : 287,646 = 287,646 : x
2. Step 2: Convert to fraction form
   131,520/287,646 = 287,646/x
3. Step 3: Cross multiply
   131,520x = 287,646 × 287,646
4. Step 4: Simplify right side
   131,520x = 82,740,221,316
5. Step 5: Solve for x
   x = 82,740,221,316/131,520
6. Step 6: Final answer
   x = 629,107.52