Finding the Fourth Proportional to 171,951.30, 257,489.55 and 164,078.10

Step by Step Solution

1. Step 1: Write the proportion equation
   171,951.30 : 257,489.55 = 164,078.10 : x
2. Step 2: Convert to fraction form
   171,951.30/257,489.55 = 164,078.10/x
3. Step 3: Cross multiply
   171,951.30x = 257,489.55 × 164,078.10
4. Step 4: Simplify right side
   171,951.30x = 42,248,396,133.86
5. Step 5: Solve for x
   x = 42,248,396,133.86/171,951.30
6. Step 6: Final answer
   x = 245,699.78