Finding the Third Proportional to 190,728 and 279,247.50

Step by Step Solution

1. Step 1: Write the proportion equation
   190,728 : 279,247.50 = 279,247.50 : x
2. Step 2: Convert to fraction form
   190,728/279,247.50 = 279,247.50/x
3. Step 3: Cross multiply
   190,728x = 279,247.50 × 279,247.50
4. Step 4: Simplify right side
   190,728x = 77,979,166,256.25
5. Step 5: Solve for x
   x = 77,979,166,256.25/190,728
6. Step 6: Final answer
   x = 408,850.12