Finding the Fourth Proportional to 3,882.69, 5,358.17 and 2,391.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,882.69 : 5,358.17 = 2,391.28 : x
2. Step 2: Convert to fraction form
   3,882.69/5,358.17 = 2,391.28/x
3. Step 3: Cross multiply
   3,882.69x = 5,358.17 × 2,391.28
4. Step 4: Simplify right side
   3,882.69x = 12,812,877.34
5. Step 5: Solve for x
   x = 12,812,877.34/3,882.69
6. Step 6: Final answer
   x = 3,300.00