Finding the Fourth Proportional to 1,158.16, 1,736.42 and 580.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.16 : 1,736.42 = 580.72 : x
2. Step 2: Convert to fraction form
   1,158.16/1,736.42 = 580.72/x
3. Step 3: Cross multiply
   1,158.16x = 1,736.42 × 580.72
4. Step 4: Simplify right side
   1,158.16x = 1,008,366.59
5. Step 5: Solve for x
   x = 1,008,366.59/1,158.16
6. Step 6: Final answer
   x = 870.67