Finding the Fourth Proportional to 1,805.21, 2,488.78 and 1,433.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,805.21 : 2,488.78 = 1,433.42 : x
2. Step 2: Convert to fraction form
   1,805.21/2,488.78 = 1,433.42/x
3. Step 3: Cross multiply
   1,805.21x = 2,488.78 × 1,433.42
4. Step 4: Simplify right side
   1,805.21x = 3,567,447.42
5. Step 5: Solve for x
   x = 3,567,447.42/1,805.21
6. Step 6: Final answer
   x = 1,976.20