Finding the Fourth Proportional to 1,442.16, 2,168.28 and 1,155.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.16 : 2,168.28 = 1,155.60 : x
2. Step 2: Convert to fraction form
   1,442.16/2,168.28 = 1,155.60/x
3. Step 3: Cross multiply
   1,442.16x = 2,168.28 × 1,155.60
4. Step 4: Simplify right side
   1,442.16x = 2,505,664.37
5. Step 5: Solve for x
   x = 2,505,664.37/1,442.16
6. Step 6: Final answer
   x = 1,737.44