Finding the Fourth Proportional to 1,145.97, 1,560.29 and 1,142.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.97 : 1,560.29 = 1,142.33 : x
2. Step 2: Convert to fraction form
   1,145.97/1,560.29 = 1,142.33/x
3. Step 3: Cross multiply
   1,145.97x = 1,560.29 × 1,142.33
4. Step 4: Simplify right side
   1,145.97x = 1,782,352.56
5. Step 5: Solve for x
   x = 1,782,352.56/1,145.97
6. Step 6: Final answer
   x = 1,555.32