Finding the Fourth Proportional to 1,158.52, 1,728.77 and 1,130.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.52 : 1,728.77 = 1,130.72 : x
2. Step 2: Convert to fraction form
   1,158.52/1,728.77 = 1,130.72/x
3. Step 3: Cross multiply
   1,158.52x = 1,728.77 × 1,130.72
4. Step 4: Simplify right side
   1,158.52x = 1,954,754.81
5. Step 5: Solve for x
   x = 1,954,754.81/1,158.52
6. Step 6: Final answer
   x = 1,687.29