Finding the Fourth Proportional to 1,168.90, 1,742.51 and 1,081.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.90 : 1,742.51 = 1,081.42 : x
2. Step 2: Convert to fraction form
   1,168.90/1,742.51 = 1,081.42/x
3. Step 3: Cross multiply
   1,168.90x = 1,742.51 × 1,081.42
4. Step 4: Simplify right side
   1,168.90x = 1,884,383.51
5. Step 5: Solve for x
   x = 1,884,383.51/1,168.90
6. Step 6: Final answer
   x = 1,612.10