Finding the Fourth Proportional to 171,556.81, 257,098.55 and 123,791.31

Step by Step Solution

1. Step 1: Write the proportion equation
   171,556.81 : 257,098.55 = 123,791.31 : x
2. Step 2: Convert to fraction form
   171,556.81/257,098.55 = 123,791.31/x
3. Step 3: Cross multiply
   171,556.81x = 257,098.55 × 123,791.31
4. Step 4: Simplify right side
   171,556.81x = 31,826,565,684.64
5. Step 5: Solve for x
   x = 31,826,565,684.64/171,556.81
6. Step 6: Final answer
   x = 185,516.19