Finding the Fourth Proportional to 2,021.52, 3,031.21 and 1,787.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.52 : 3,031.21 = 1,787.82 : x
2. Step 2: Convert to fraction form
   2,021.52/3,031.21 = 1,787.82/x
3. Step 3: Cross multiply
   2,021.52x = 3,031.21 × 1,787.82
4. Step 4: Simplify right side
   2,021.52x = 5,419,253.39
5. Step 5: Solve for x
   x = 5,419,253.39/2,021.52
6. Step 6: Final answer
   x = 2,680.78