Finding the Third Proportional to 199,315 and 308,935.50

Step by Step Solution

1. Step 1: Write the proportion equation
   199,315 : 308,935.50 = 308,935.50 : x
2. Step 2: Convert to fraction form
   199,315/308,935.50 = 308,935.50/x
3. Step 3: Cross multiply
   199,315x = 308,935.50 × 308,935.50
4. Step 4: Simplify right side
   199,315x = 95,441,143,160.25
5. Step 5: Solve for x
   x = 95,441,143,160.25/199,315
6. Step 6: Final answer
   x = 478,845.76