Finding the Fourth Proportional to 31,015.38, 42,804.39 and 18,272.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,015.38 : 42,804.39 = 18,272.56 : x
2. Step 2: Convert to fraction form
   31,015.38/42,804.39 = 18,272.56/x
3. Step 3: Cross multiply
   31,015.38x = 42,804.39 × 18,272.56
4. Step 4: Simplify right side
   31,015.38x = 782,145,784.54
5. Step 5: Solve for x
   x = 782,145,784.54/31,015.38
6. Step 6: Final answer
   x = 25,218.00