Finding the Fourth Proportional to 3,945.42, 5,442.90 and 2,266.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.42 : 5,442.90 = 2,266.42 : x
2. Step 2: Convert to fraction form
   3,945.42/5,442.90 = 2,266.42/x
3. Step 3: Cross multiply
   3,945.42x = 5,442.90 × 2,266.42
4. Step 4: Simplify right side
   3,945.42x = 12,335,897.42
5. Step 5: Solve for x
   x = 12,335,897.42/3,945.42
6. Step 6: Final answer
   x = 3,126.64