Finding the Fourth Proportional to 2,389.56, 3,583.72 and 927.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.56 : 3,583.72 = 927.91 : x
2. Step 2: Convert to fraction form
   2,389.56/3,583.72 = 927.91/x
3. Step 3: Cross multiply
   2,389.56x = 3,583.72 × 927.91
4. Step 4: Simplify right side
   2,389.56x = 3,325,369.63
5. Step 5: Solve for x
   x = 3,325,369.63/2,389.56
6. Step 6: Final answer
   x = 1,391.62