Finding the Fourth Proportional to 31,147.94, 42,989.73 and 18,573.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,147.94 : 42,989.73 = 18,573.50 : x
2. Step 2: Convert to fraction form
   31,147.94/42,989.73 = 18,573.50/x
3. Step 3: Cross multiply
   31,147.94x = 42,989.73 × 18,573.50
4. Step 4: Simplify right side
   31,147.94x = 798,469,750.16
5. Step 5: Solve for x
   x = 798,469,750.16/31,147.94
6. Step 6: Final answer
   x = 25,634.75