Finding the Third Proportional to 131,443 and 287,761

Step by Step Solution

1. Step 1: Write the proportion equation
   131,443 : 287,761 = 287,761 : x
2. Step 2: Convert to fraction form
   131,443/287,761 = 287,761/x
3. Step 3: Cross multiply
   131,443x = 287,761 × 287,761
4. Step 4: Simplify right side
   131,443x = 82,806,393,121
5. Step 5: Solve for x
   x = 82,806,393,121/131,443
6. Step 6: Final answer
   x = 629,979.48