Finding the Third Proportional to 131,506 and 287,612

Step by Step Solution

1. Step 1: Write the proportion equation
   131,506 : 287,612 = 287,612 : x
2. Step 2: Convert to fraction form
   131,506/287,612 = 287,612/x
3. Step 3: Cross multiply
   131,506x = 287,612 × 287,612
4. Step 4: Simplify right side
   131,506x = 82,720,662,544
5. Step 5: Solve for x
   x = 82,720,662,544/131,506
6. Step 6: Final answer
   x = 629,025.77