Finding the Third Proportional to 155,548.50 and 317,655

Step by Step Solution

1. Step 1: Write the proportion equation
   155,548.50 : 317,655 = 317,655 : x
2. Step 2: Convert to fraction form
   155,548.50/317,655 = 317,655/x
3. Step 3: Cross multiply
   155,548.50x = 317,655 × 317,655
4. Step 4: Simplify right side
   155,548.50x = 100,904,699,025
5. Step 5: Solve for x
   x = 100,904,699,025/155,548.50
6. Step 6: Final answer
   x = 648,702.49