Finding the Fourth Proportional to 315,111.81, 434,859.48 and 171,871.86

Step by Step Solution

1. Step 1: Write the proportion equation
   315,111.81 : 434,859.48 = 171,871.86 : x
2. Step 2: Convert to fraction form
   315,111.81/434,859.48 = 171,871.86/x
3. Step 3: Cross multiply
   315,111.81x = 434,859.48 × 171,871.86
4. Step 4: Simplify right side
   315,111.81x = 74,740,107,666.23
5. Step 5: Solve for x
   x = 74,740,107,666.23/315,111.81
6. Step 6: Final answer
   x = 237,185.99