Finding the Third Proportional to 156,940 and 339,030

Step by Step Solution

1. Step 1: Write the proportion equation
   156,940 : 339,030 = 339,030 : x
2. Step 2: Convert to fraction form
   156,940/339,030 = 339,030/x
3. Step 3: Cross multiply
   156,940x = 339,030 × 339,030
4. Step 4: Simplify right side
   156,940x = 114,941,340,900
5. Step 5: Solve for x
   x = 114,941,340,900/156,940
6. Step 6: Final answer
   x = 732,390.35