Finding the Third Proportional to 231,340.50 and 345,087

Step by Step Solution

1. Step 1: Write the proportion equation
   231,340.50 : 345,087 = 345,087 : x
2. Step 2: Convert to fraction form
   231,340.50/345,087 = 345,087/x
3. Step 3: Cross multiply
   231,340.50x = 345,087 × 345,087
4. Step 4: Simplify right side
   231,340.50x = 119,085,037,569
5. Step 5: Solve for x
   x = 119,085,037,569/231,340.50
6. Step 6: Final answer
   x = 514,760.87