Finding the Third Proportional to 187,109.50 and 402,238

Step by Step Solution

1. Step 1: Write the proportion equation
   187,109.50 : 402,238 = 402,238 : x
2. Step 2: Convert to fraction form
   187,109.50/402,238 = 402,238/x
3. Step 3: Cross multiply
   187,109.50x = 402,238 × 402,238
4. Step 4: Simplify right side
   187,109.50x = 161,795,408,644
5. Step 5: Solve for x
   x = 161,795,408,644/187,109.50
6. Step 6: Final answer
   x = 864,709.75