Finding the Fourth Proportional to 5,286.89, 7,933.99 and 5,245.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,286.89 : 7,933.99 = 5,245.89 : x
2. Step 2: Convert to fraction form
   5,286.89/7,933.99 = 5,245.89/x
3. Step 3: Cross multiply
   5,286.89x = 7,933.99 × 5,245.89
4. Step 4: Simplify right side
   5,286.89x = 41,620,825.69
5. Step 5: Solve for x
   x = 41,620,825.69/5,286.89
6. Step 6: Final answer
   x = 7,872.46