Finding the Fourth Proportional to 2,390.57, 3,584.57 and 1,156.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.57 : 3,584.57 = 1,156.79 : x
2. Step 2: Convert to fraction form
   2,390.57/3,584.57 = 1,156.79/x
3. Step 3: Cross multiply
   2,390.57x = 3,584.57 × 1,156.79
4. Step 4: Simplify right side
   2,390.57x = 4,146,597.91
5. Step 5: Solve for x
   x = 4,146,597.91/2,390.57
6. Step 6: Final answer
   x = 1,734.56