Finding the Fourth Proportional to 2,164.28, 2,987.72 and 1,418.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.28 : 2,987.72 = 1,418.28 : x
2. Step 2: Convert to fraction form
   2,164.28/2,987.72 = 1,418.28/x
3. Step 3: Cross multiply
   2,164.28x = 2,987.72 × 1,418.28
4. Step 4: Simplify right side
   2,164.28x = 4,237,423.52
5. Step 5: Solve for x
   x = 4,237,423.52/2,164.28
6. Step 6: Final answer
   x = 1,957.89