Finding the Third Proportional to 187,945.50 and 391,443

Step by Step Solution

1. Step 1: Write the proportion equation
   187,945.50 : 391,443 = 391,443 : x
2. Step 2: Convert to fraction form
   187,945.50/391,443 = 391,443/x
3. Step 3: Cross multiply
   187,945.50x = 391,443 × 391,443
4. Step 4: Simplify right side
   187,945.50x = 153,227,622,249
5. Step 5: Solve for x
   x = 153,227,622,249/187,945.50
6. Step 6: Final answer
   x = 815,276.89