Finding the Fourth Proportional to 2,987.42, 4,120.89 and 1,940.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,987.42 : 4,120.89 = 1,940.18 : x
2. Step 2: Convert to fraction form
   2,987.42/4,120.89 = 1,940.18/x
3. Step 3: Cross multiply
   2,987.42x = 4,120.89 × 1,940.18
4. Step 4: Simplify right side
   2,987.42x = 7,995,268.36
5. Step 5: Solve for x
   x = 7,995,268.36/2,987.42
6. Step 6: Final answer
   x = 2,676.31