Finding the Third Proportional to 142,499 and 304,909

Step by Step Solution

1. Step 1: Write the proportion equation
   142,499 : 304,909 = 304,909 : x
2. Step 2: Convert to fraction form
   142,499/304,909 = 304,909/x
3. Step 3: Cross multiply
   142,499x = 304,909 × 304,909
4. Step 4: Simplify right side
   142,499x = 92,969,498,281
5. Step 5: Solve for x
   x = 92,969,498,281/142,499
6. Step 6: Final answer
   x = 652,422.11