Finding the Third Proportional to 199,144 and 308,280

Step by Step Solution

1. Step 1: Write the proportion equation
   199,144 : 308,280 = 308,280 : x
2. Step 2: Convert to fraction form
   199,144/308,280 = 308,280/x
3. Step 3: Cross multiply
   199,144x = 308,280 × 308,280
4. Step 4: Simplify right side
   199,144x = 95,036,558,400
5. Step 5: Solve for x
   x = 95,036,558,400/199,144
6. Step 6: Final answer
   x = 477,225.32