Finding the Fourth Proportional to 19,874, 27,431.88 and 13,250

Step by Step Solution

1. Step 1: Write the proportion equation
   19,874 : 27,431.88 = 13,250 : x
2. Step 2: Convert to fraction form
   19,874/27,431.88 = 13,250/x
3. Step 3: Cross multiply
   19,874x = 27,431.88 × 13,250
4. Step 4: Simplify right side
   19,874x = 363,472,410
5. Step 5: Solve for x
   x = 363,472,410/19,874
6. Step 6: Final answer
   x = 18,288.84