Finding the Fourth Proportional to 315,105.72, 434,842.20 and 171,866.96

Step by Step Solution

1. Step 1: Write the proportion equation
   315,105.72 : 434,842.20 = 171,866.96 : x
2. Step 2: Convert to fraction form
   315,105.72/434,842.20 = 171,866.96/x
3. Step 3: Cross multiply
   315,105.72x = 434,842.20 × 171,866.96
4. Step 4: Simplify right side
   315,105.72x = 74,735,006,993.71
5. Step 5: Solve for x
   x = 74,735,006,993.71/315,105.72
6. Step 6: Final answer
   x = 237,174.39