Finding the Third Proportional to 199,808 and 309,362

Step by Step Solution

1. Step 1: Write the proportion equation
   199,808 : 309,362 = 309,362 : x
2. Step 2: Convert to fraction form
   199,808/309,362 = 309,362/x
3. Step 3: Cross multiply
   199,808x = 309,362 × 309,362
4. Step 4: Simplify right side
   199,808x = 95,704,847,044
5. Step 5: Solve for x
   x = 95,704,847,044/199,808
6. Step 6: Final answer
   x = 478,984.06