Finding the Third Proportional to 141,940 and 309,080

Step by Step Solution

1. Step 1: Write the proportion equation
   141,940 : 309,080 = 309,080 : x
2. Step 2: Convert to fraction form
   141,940/309,080 = 309,080/x
3. Step 3: Cross multiply
   141,940x = 309,080 × 309,080
4. Step 4: Simplify right side
   141,940x = 95,530,446,400
5. Step 5: Solve for x
   x = 95,530,446,400/141,940
6. Step 6: Final answer
   x = 673,034.00