Finding the Fourth Proportional to 362,216.78, 543,103.55 and 172,735.10

Step by Step Solution

1. Step 1: Write the proportion equation
   362,216.78 : 543,103.55 = 172,735.10 : x
2. Step 2: Convert to fraction form
   362,216.78/543,103.55 = 172,735.10/x
3. Step 3: Cross multiply
   362,216.78x = 543,103.55 × 172,735.10
4. Step 4: Simplify right side
   362,216.78x = 93,813,045,155.93
5. Step 5: Solve for x
   x = 93,813,045,155.93/362,216.78
6. Step 6: Final answer
   x = 258,996.96