Finding the Third Proportional to 131,120 and 287,510

Step by Step Solution

1. Step 1: Write the proportion equation
   131,120 : 287,510 = 287,510 : x
2. Step 2: Convert to fraction form
   131,120/287,510 = 287,510/x
3. Step 3: Cross multiply
   131,120x = 287,510 × 287,510
4. Step 4: Simplify right side
   131,120x = 82,662,000,100
5. Step 5: Solve for x
   x = 82,662,000,100/131,120
6. Step 6: Final answer
   x = 630,430.14