Finding the Fourth Proportional to 1,395.42, 2,089.89 and 1,164.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.42 : 2,089.89 = 1,164.30 : x
2. Step 2: Convert to fraction form
   1,395.42/2,089.89 = 1,164.30/x
3. Step 3: Cross multiply
   1,395.42x = 2,089.89 × 1,164.30
4. Step 4: Simplify right side
   1,395.42x = 2,433,258.93
5. Step 5: Solve for x
   x = 2,433,258.93/1,395.42
6. Step 6: Final answer
   x = 1,743.75