Finding the Fourth Proportional to 31,431.57, 43,375.71 and 17,091.54

Step by Step Solution

1. Step 1: Write the proportion equation
   31,431.57 : 43,375.71 = 17,091.54 : x
2. Step 2: Convert to fraction form
   31,431.57/43,375.71 = 17,091.54/x
3. Step 3: Cross multiply
   31,431.57x = 43,375.71 × 17,091.54
4. Step 4: Simplify right side
   31,431.57x = 741,357,682.49
5. Step 5: Solve for x
   x = 741,357,682.49/31,431.57
6. Step 6: Final answer
   x = 23,586.40