Finding the Third Proportional to 155,911.50 and 339,156

Step by Step Solution

1. Step 1: Write the proportion equation
   155,911.50 : 339,156 = 339,156 : x
2. Step 2: Convert to fraction form
   155,911.50/339,156 = 339,156/x
3. Step 3: Cross multiply
   155,911.50x = 339,156 × 339,156
4. Step 4: Simplify right side
   155,911.50x = 115,026,792,336
5. Step 5: Solve for x
   x = 115,026,792,336/155,911.50
6. Step 6: Final answer
   x = 737,769.78