Finding the Third Proportional to 199,551 and 309,820

Step by Step Solution

1. Step 1: Write the proportion equation
   199,551 : 309,820 = 309,820 : x
2. Step 2: Convert to fraction form
   199,551/309,820 = 309,820/x
3. Step 3: Cross multiply
   199,551x = 309,820 × 309,820
4. Step 4: Simplify right side
   199,551x = 95,988,432,400
5. Step 5: Solve for x
   x = 95,988,432,400/199,551
6. Step 6: Final answer
   x = 481,022.06