Finding the Fourth Proportional to 2,589.94, 3,886.42 and 1,129.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,589.94 : 3,886.42 = 1,129.30 : x
2. Step 2: Convert to fraction form
   2,589.94/3,886.42 = 1,129.30/x
3. Step 3: Cross multiply
   2,589.94x = 3,886.42 × 1,129.30
4. Step 4: Simplify right side
   2,589.94x = 4,388,934.11
5. Step 5: Solve for x
   x = 4,388,934.11/2,589.94
6. Step 6: Final answer
   x = 1,694.61