Finding the Fourth Proportional to 171,887.89, 257,568.10 and 71,993.42

Step by Step Solution

1. Step 1: Write the proportion equation
   171,887.89 : 257,568.10 = 71,993.42 : x
2. Step 2: Convert to fraction form
   171,887.89/257,568.10 = 71,993.42/x
3. Step 3: Cross multiply
   171,887.89x = 257,568.10 × 71,993.42
4. Step 4: Simplify right side
   171,887.89x = 18,543,208,401.90
5. Step 5: Solve for x
   x = 18,543,208,401.90/171,887.89
6. Step 6: Final answer
   x = 107,879.67