Finding the Fourth Proportional to 2,031.40, 3,048.42 and 799.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,031.40 : 3,048.42 = 799.78 : x
2. Step 2: Convert to fraction form
   2,031.40/3,048.42 = 799.78/x
3. Step 3: Cross multiply
   2,031.40x = 3,048.42 × 799.78
4. Step 4: Simplify right side
   2,031.40x = 2,438,065.35
5. Step 5: Solve for x
   x = 2,438,065.35/2,031.40
6. Step 6: Final answer
   x = 1,200.19