Finding the Fourth Proportional to 31,055.50, 42,867.39 and 18,479.98

Step by Step Solution

1. Step 1: Write the proportion equation
   31,055.50 : 42,867.39 = 18,479.98 : x
2. Step 2: Convert to fraction form
   31,055.50/42,867.39 = 18,479.98/x
3. Step 3: Cross multiply
   31,055.50x = 42,867.39 × 18,479.98
4. Step 4: Simplify right side
   31,055.50x = 792,188,509.85
5. Step 5: Solve for x
   x = 792,188,509.85/31,055.50
6. Step 6: Final answer
   x = 25,508.80