Finding the Fourth Proportional to 3,839.72, 5,760.38 and 1,891.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,839.72 : 5,760.38 = 1,891.67 : x
2. Step 2: Convert to fraction form
   3,839.72/5,760.38 = 1,891.67/x
3. Step 3: Cross multiply
   3,839.72x = 5,760.38 × 1,891.67
4. Step 4: Simplify right side
   3,839.72x = 10,896,713.96
5. Step 5: Solve for x
   x = 10,896,713.96/3,839.72
6. Step 6: Final answer
   x = 2,837.90