Finding the Third Proportional to 131,123 and 287,518

Step by Step Solution

1. Step 1: Write the proportion equation
   131,123 : 287,518 = 287,518 : x
2. Step 2: Convert to fraction form
   131,123/287,518 = 287,518/x
3. Step 3: Cross multiply
   131,123x = 287,518 × 287,518
4. Step 4: Simplify right side
   131,123x = 82,666,600,324
5. Step 5: Solve for x
   x = 82,666,600,324/131,123
6. Step 6: Final answer
   x = 630,450.80