Finding the Fourth Proportional to 2,389.20, 3,583.86 and 1,156.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.20 : 3,583.86 = 1,156.38 : x
2. Step 2: Convert to fraction form
   2,389.20/3,583.86 = 1,156.38/x
3. Step 3: Cross multiply
   2,389.20x = 3,583.86 × 1,156.38
4. Step 4: Simplify right side
   2,389.20x = 4,144,304.03
5. Step 5: Solve for x
   x = 4,144,304.03/2,389.20
6. Step 6: Final answer
   x = 1,734.60