Finding the Fourth Proportional to 2,164.57, 2,987.61 and 1,418.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.57 : 2,987.61 = 1,418.11 : x
2. Step 2: Convert to fraction form
   2,164.57/2,987.61 = 1,418.11/x
3. Step 3: Cross multiply
   2,164.57x = 2,987.61 × 1,418.11
4. Step 4: Simplify right side
   2,164.57x = 4,236,750.82
5. Step 5: Solve for x
   x = 4,236,750.82/2,164.57
6. Step 6: Final answer
   x = 1,957.31