Finding the Fourth Proportional to 2,640.81, 3,962.59 and 1,342.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.81 : 3,962.59 = 1,342.28 : x
2. Step 2: Convert to fraction form
   2,640.81/3,962.59 = 1,342.28/x
3. Step 3: Cross multiply
   2,640.81x = 3,962.59 × 1,342.28
4. Step 4: Simplify right side
   2,640.81x = 5,318,905.31
5. Step 5: Solve for x
   x = 5,318,905.31/2,640.81
6. Step 6: Final answer
   x = 2,014.12