Finding the Fourth Proportional to 31,427.70, 43,369.50 and 17,087.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,427.70 : 43,369.50 = 17,087.31 : x
2. Step 2: Convert to fraction form
   31,427.70/43,369.50 = 17,087.31/x
3. Step 3: Cross multiply
   31,427.70x = 43,369.50 × 17,087.31
4. Step 4: Simplify right side
   31,427.70x = 741,068,091.05
5. Step 5: Solve for x
   x = 741,068,091.05/31,427.70
6. Step 6: Final answer
   x = 23,580.09