Finding the Third Proportional to 131,461 and 287,800

Step by Step Solution

1. Step 1: Write the proportion equation
   131,461 : 287,800 = 287,800 : x
2. Step 2: Convert to fraction form
   131,461/287,800 = 287,800/x
3. Step 3: Cross multiply
   131,461x = 287,800 × 287,800
4. Step 4: Simplify right side
   131,461x = 82,828,840,000
5. Step 5: Solve for x
   x = 82,828,840,000/131,461
6. Step 6: Final answer
   x = 630,063.97