Finding the Fourth Proportional to 2,070.24, 3,105.49 and 771.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.24 : 3,105.49 = 771.27 : x
2. Step 2: Convert to fraction form
   2,070.24/3,105.49 = 771.27/x
3. Step 3: Cross multiply
   2,070.24x = 3,105.49 × 771.27
4. Step 4: Simplify right side
   2,070.24x = 2,395,171.27
5. Step 5: Solve for x
   x = 2,395,171.27/2,070.24
6. Step 6: Final answer
   x = 1,156.95