Finding the Fourth Proportional to 3,918.16, 5,866.71 and 2,065.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,918.16 : 5,866.71 = 2,065.42 : x
2. Step 2: Convert to fraction form
   3,918.16/5,866.71 = 2,065.42/x
3. Step 3: Cross multiply
   3,918.16x = 5,866.71 × 2,065.42
4. Step 4: Simplify right side
   3,918.16x = 12,117,220.17
5. Step 5: Solve for x
   x = 12,117,220.17/3,918.16
6. Step 6: Final answer
   x = 3,092.58