Finding the Third Proportional to 187,320 and 287,238

Step by Step Solution

1. Step 1: Write the proportion equation
   187,320 : 287,238 = 287,238 : x
2. Step 2: Convert to fraction form
   187,320/287,238 = 287,238/x
3. Step 3: Cross multiply
   187,320x = 287,238 × 287,238
4. Step 4: Simplify right side
   187,320x = 82,505,668,644
5. Step 5: Solve for x
   x = 82,505,668,644/187,320
6. Step 6: Final answer
   x = 440,453.07