Finding the Third Proportional to 191,728 and 403,287.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,728 : 403,287.50 = 403,287.50 : x
2. Step 2: Convert to fraction form
   191,728/403,287.50 = 403,287.50/x
3. Step 3: Cross multiply
   191,728x = 403,287.50 × 403,287.50
4. Step 4: Simplify right side
   191,728x = 162,640,807,656.25
5. Step 5: Solve for x
   x = 162,640,807,656.25/191,728
6. Step 6: Final answer
   x = 848,289.28