Finding the Fourth Proportional to 171,433.71, 257,191.61 and 71,538.33

Step by Step Solution

1. Step 1: Write the proportion equation
   171,433.71 : 257,191.61 = 71,538.33 : x
2. Step 2: Convert to fraction form
   171,433.71/257,191.61 = 71,538.33/x
3. Step 3: Cross multiply
   171,433.71x = 257,191.61 × 71,538.33
4. Step 4: Simplify right side
   171,433.71x = 18,399,057,911.72
5. Step 5: Solve for x
   x = 18,399,057,911.72/171,433.71
6. Step 6: Final answer
   x = 107,324.62