Finding the Fourth Proportional to 3,967.10, 5,959.76 and 2,799.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,967.10 : 5,959.76 = 2,799.78 : x
2. Step 2: Convert to fraction form
   3,967.10/5,959.76 = 2,799.78/x
3. Step 3: Cross multiply
   3,967.10x = 5,959.76 × 2,799.78
4. Step 4: Simplify right side
   3,967.10x = 16,686,002.85
5. Step 5: Solve for x
   x = 16,686,002.85/3,967.10
6. Step 6: Final answer
   x = 4,206.10