Finding the Third Proportional to 155,239.50 and 231,435

Step by Step Solution

1. Step 1: Write the proportion equation
   155,239.50 : 231,435 = 231,435 : x
2. Step 2: Convert to fraction form
   155,239.50/231,435 = 231,435/x
3. Step 3: Cross multiply
   155,239.50x = 231,435 × 231,435
4. Step 4: Simplify right side
   155,239.50x = 53,562,159,225
5. Step 5: Solve for x
   x = 53,562,159,225/155,239.50
6. Step 6: Final answer
   x = 345,029.19