Finding the Third Proportional to 186,900.75 and 398,268

Step by Step Solution

1. Step 1: Write the proportion equation
   186,900.75 : 398,268 = 398,268 : x
2. Step 2: Convert to fraction form
   186,900.75/398,268 = 398,268/x
3. Step 3: Cross multiply
   186,900.75x = 398,268 × 398,268
4. Step 4: Simplify right side
   186,900.75x = 158,617,399,824
5. Step 5: Solve for x
   x = 158,617,399,824/186,900.75
6. Step 6: Final answer
   x = 848,671.82