Finding the Third Proportional to 131,432.50 and 287,189

Step by Step Solution

1. Step 1: Write the proportion equation
   131,432.50 : 287,189 = 287,189 : x
2. Step 2: Convert to fraction form
   131,432.50/287,189 = 287,189/x
3. Step 3: Cross multiply
   131,432.50x = 287,189 × 287,189
4. Step 4: Simplify right side
   131,432.50x = 82,477,521,721
5. Step 5: Solve for x
   x = 82,477,521,721/131,432.50
6. Step 6: Final answer
   x = 627,527.60