Finding the Fourth Proportional to 1,605.42, 2,214.50 and 1,418.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.42 : 2,214.50 = 1,418.31 : x
2. Step 2: Convert to fraction form
   1,605.42/2,214.50 = 1,418.31/x
3. Step 3: Cross multiply
   1,605.42x = 2,214.50 × 1,418.31
4. Step 4: Simplify right side
   1,605.42x = 3,140,840.40
5. Step 5: Solve for x
   x = 3,140,840.40/1,605.42
6. Step 6: Final answer
   x = 1,956.40