Finding the Fourth Proportional to 2,021.76, 3,031.02 and 1,200.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.76 : 3,031.02 = 1,200.42 : x
2. Step 2: Convert to fraction form
   2,021.76/3,031.02 = 1,200.42/x
3. Step 3: Cross multiply
   2,021.76x = 3,031.02 × 1,200.42
4. Step 4: Simplify right side
   2,021.76x = 3,638,497.03
5. Step 5: Solve for x
   x = 3,638,497.03/2,021.76
6. Step 6: Final answer
   x = 1,799.67