Finding the Fourth Proportional to 1,143.30, 1,579.59 and 1,055.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,143.30 : 1,579.59 = 1,055.82 : x
2. Step 2: Convert to fraction form
   1,143.30/1,579.59 = 1,055.82/x
3. Step 3: Cross multiply
   1,143.30x = 1,579.59 × 1,055.82
4. Step 4: Simplify right side
   1,143.30x = 1,667,762.71
5. Step 5: Solve for x
   x = 1,667,762.71/1,143.30
6. Step 6: Final answer
   x = 1,458.73