Finding the Third Proportional to 155,218.50 and 340,245

Step by Step Solution

1. Step 1: Write the proportion equation
   155,218.50 : 340,245 = 340,245 : x
2. Step 2: Convert to fraction form
   155,218.50/340,245 = 340,245/x
3. Step 3: Cross multiply
   155,218.50x = 340,245 × 340,245
4. Step 4: Simplify right side
   155,218.50x = 115,766,660,025
5. Step 5: Solve for x
   x = 115,766,660,025/155,218.50
6. Step 6: Final answer
   x = 745,830.30