Finding the Fourth Proportional to 2,021.62, 2,789.88 and 1,137.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.62 : 2,789.88 = 1,137.42 : x
2. Step 2: Convert to fraction form
   2,021.62/2,789.88 = 1,137.42/x
3. Step 3: Cross multiply
   2,021.62x = 2,789.88 × 1,137.42
4. Step 4: Simplify right side
   2,021.62x = 3,173,265.31
5. Step 5: Solve for x
   x = 3,173,265.31/2,021.62
6. Step 6: Final answer
   x = 1,569.66