Finding the Fourth Proportional to 1,155.33, 1,593.03 and 918.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.33 : 1,593.03 = 918.81 : x
2. Step 2: Convert to fraction form
   1,155.33/1,593.03 = 918.81/x
3. Step 3: Cross multiply
   1,155.33x = 1,593.03 × 918.81
4. Step 4: Simplify right side
   1,155.33x = 1,463,691.89
5. Step 5: Solve for x
   x = 1,463,691.89/1,155.33
6. Step 6: Final answer
   x = 1,266.90