Finding the Fourth Proportional to 2,021.32, 2,789.12 and 1,137.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.32 : 2,789.12 = 1,137.07 : x
2. Step 2: Convert to fraction form
   2,021.32/2,789.12 = 1,137.07/x
3. Step 3: Cross multiply
   2,021.32x = 2,789.12 × 1,137.07
4. Step 4: Simplify right side
   2,021.32x = 3,171,405.05
5. Step 5: Solve for x
   x = 3,171,405.05/2,021.32
6. Step 6: Final answer
   x = 1,568.98