Finding the Fourth Proportional to 2,165.15, 2,985.91 and 1,418.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,165.15 : 2,985.91 = 1,418.83 : x
2. Step 2: Convert to fraction form
   2,165.15/2,985.91 = 1,418.83/x
3. Step 3: Cross multiply
   2,165.15x = 2,985.91 × 1,418.83
4. Step 4: Simplify right side
   2,165.15x = 4,236,502.60
5. Step 5: Solve for x
   x = 4,236,502.60/2,165.15
6. Step 6: Final answer
   x = 1,956.68