Finding the Fourth Proportional to 31,056.26, 42,856.71 and 17,258.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,056.26 : 42,856.71 = 17,258.55 : x
2. Step 2: Convert to fraction form
   31,056.26/42,856.71 = 17,258.55/x
3. Step 3: Cross multiply
   31,056.26x = 42,856.71 × 17,258.55
4. Step 4: Simplify right side
   31,056.26x = 739,644,446.94
5. Step 5: Solve for x
   x = 739,644,446.94/31,056.26
6. Step 6: Final answer
   x = 23,816.28