Finding the Fourth Proportional to 4,086.78, 6,128.37 and 1,164.42

Step by Step Solution

1. Step 1: Write the proportion equation
   4,086.78 : 6,128.37 = 1,164.42 : x
2. Step 2: Convert to fraction form
   4,086.78/6,128.37 = 1,164.42/x
3. Step 3: Cross multiply
   4,086.78x = 6,128.37 × 1,164.42
4. Step 4: Simplify right side
   4,086.78x = 7,135,996.60
5. Step 5: Solve for x
   x = 7,135,996.60/4,086.78
6. Step 6: Final answer
   x = 1,746.12