Finding the Third Proportional to 187,738 and 391,008

Step by Step Solution

1. Step 1: Write the proportion equation
   187,738 : 391,008 = 391,008 : x
2. Step 2: Convert to fraction form
   187,738/391,008 = 391,008/x
3. Step 3: Cross multiply
   187,738x = 391,008 × 391,008
4. Step 4: Simplify right side
   187,738x = 152,887,256,064
5. Step 5: Solve for x
   x = 152,887,256,064/187,738
6. Step 6: Final answer
   x = 814,365.00