Finding the Fourth Proportional to 1,605.91, 2,216.43 and 1,343.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.91 : 2,216.43 = 1,343.83 : x
2. Step 2: Convert to fraction form
   1,605.91/2,216.43 = 1,343.83/x
3. Step 3: Cross multiply
   1,605.91x = 2,216.43 × 1,343.83
4. Step 4: Simplify right side
   1,605.91x = 2,978,505.13
5. Step 5: Solve for x
   x = 2,978,505.13/1,605.91
6. Step 6: Final answer
   x = 1,854.71