Finding the Fourth Proportional to 1,059.72, 1,589.30 and 290.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.72 : 1,589.30 = 290.04 : x
2. Step 2: Convert to fraction form
   1,059.72/1,589.30 = 290.04/x
3. Step 3: Cross multiply
   1,059.72x = 1,589.30 × 290.04
4. Step 4: Simplify right side
   1,059.72x = 460,960.57
5. Step 5: Solve for x
   x = 460,960.57/1,059.72
6. Step 6: Final answer
   x = 434.98