Finding the Fourth Proportional to 171,804.30, 257,269.05 and 163,931.10

Step by Step Solution

1. Step 1: Write the proportion equation
   171,804.30 : 257,269.05 = 163,931.10 : x
2. Step 2: Convert to fraction form
   171,804.30/257,269.05 = 163,931.10/x
3. Step 3: Cross multiply
   171,804.30x = 257,269.05 × 163,931.10
4. Step 4: Simplify right side
   171,804.30x = 42,174,398,362.46
5. Step 5: Solve for x
   x = 42,174,398,362.46/171,804.30
6. Step 6: Final answer
   x = 245,479.29