Finding the Third Proportional to 131,124 and 287,274

Step by Step Solution

1. Step 1: Write the proportion equation
   131,124 : 287,274 = 287,274 : x
2. Step 2: Convert to fraction form
   131,124/287,274 = 287,274/x
3. Step 3: Cross multiply
   131,124x = 287,274 × 287,274
4. Step 4: Simplify right side
   131,124x = 82,526,351,076
5. Step 5: Solve for x
   x = 82,526,351,076/131,124
6. Step 6: Final answer
   x = 629,376.40