Finding the Third Proportional to 191,168 and 398,012

Step by Step Solution

1. Step 1: Write the proportion equation
   191,168 : 398,012 = 398,012 : x
2. Step 2: Convert to fraction form
   191,168/398,012 = 398,012/x
3. Step 3: Cross multiply
   191,168x = 398,012 × 398,012
4. Step 4: Simplify right side
   191,168x = 158,413,552,144
5. Step 5: Solve for x
   x = 158,413,552,144/191,168
6. Step 6: Final answer
   x = 828,661.45