Finding the Third Proportional to 191,205 and 394,690.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,205 : 394,690.50 = 394,690.50 : x
2. Step 2: Convert to fraction form
   191,205/394,690.50 = 394,690.50/x
3. Step 3: Cross multiply
   191,205x = 394,690.50 × 394,690.50
4. Step 4: Simplify right side
   191,205x = 155,780,590,790.25
5. Step 5: Solve for x
   x = 155,780,590,790.25/191,205
6. Step 6: Final answer
   x = 814,730.74