Finding the Fourth Proportional to 315,171, 434,935.98 and 171,931.61

Step by Step Solution

1. Step 1: Write the proportion equation
   315,171 : 434,935.98 = 171,931.61 : x
2. Step 2: Convert to fraction form
   315,171/434,935.98 = 171,931.61/x
3. Step 3: Cross multiply
   315,171x = 434,935.98 × 171,931.61
4. Step 4: Simplify right side
   315,171x = 74,779,244,375.67
5. Step 5: Solve for x
   x = 74,779,244,375.67/315,171
6. Step 6: Final answer
   x = 237,265.63