Finding the Third Proportional to 199,107 and 308,290.50

Step by Step Solution

1. Step 1: Write the proportion equation
   199,107 : 308,290.50 = 308,290.50 : x
2. Step 2: Convert to fraction form
   199,107/308,290.50 = 308,290.50/x
3. Step 3: Cross multiply
   199,107x = 308,290.50 × 308,290.50
4. Step 4: Simplify right side
   199,107x = 95,043,032,390.25
5. Step 5: Solve for x
   x = 95,043,032,390.25/199,107
6. Step 6: Final answer
   x = 477,346.51