Finding the Fourth Proportional to 383,010.56, 574,516.16 and 172,402.56

Step by Step Solution

1. Step 1: Write the proportion equation
   383,010.56 : 574,516.16 = 172,402.56 : x
2. Step 2: Convert to fraction form
   383,010.56/574,516.16 = 172,402.56/x
3. Step 3: Cross multiply
   383,010.56x = 574,516.16 × 172,402.56
4. Step 4: Simplify right side
   383,010.56x = 99,048,056,745.37
5. Step 5: Solve for x
   x = 99,048,056,745.37/383,010.56
6. Step 6: Final answer
   x = 258,603.98