Finding the Third Proportional to 199,620 and 307,690.50

Step by Step Solution

1. Step 1: Write the proportion equation
   199,620 : 307,690.50 = 307,690.50 : x
2. Step 2: Convert to fraction form
   199,620/307,690.50 = 307,690.50/x
3. Step 3: Cross multiply
   199,620x = 307,690.50 × 307,690.50
4. Step 4: Simplify right side
   199,620x = 94,673,443,790.25
5. Step 5: Solve for x
   x = 94,673,443,790.25/199,620
6. Step 6: Final answer
   x = 474,268.33