Finding the Fourth Proportional to 10,253.82, 15,380.45 and 2,857.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,253.82 : 15,380.45 = 2,857.98 : x
2. Step 2: Convert to fraction form
   10,253.82/15,380.45 = 2,857.98/x
3. Step 3: Cross multiply
   10,253.82x = 15,380.45 × 2,857.98
4. Step 4: Simplify right side
   10,253.82x = 43,957,004.20
5. Step 5: Solve for x
   x = 43,957,004.20/10,253.82
6. Step 6: Final answer
   x = 4,286.89