Finding the Fourth Proportional to 1,145.67, 1,579.55 and 935.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.67 : 1,579.55 = 935.62 : x
2. Step 2: Convert to fraction form
   1,145.67/1,579.55 = 935.62/x
3. Step 3: Cross multiply
   1,145.67x = 1,579.55 × 935.62
4. Step 4: Simplify right side
   1,145.67x = 1,477,853.89
5. Step 5: Solve for x
   x = 1,477,853.89/1,145.67
6. Step 6: Final answer
   x = 1,289.95