Finding the Fourth Proportional to 2,628.85, 3,944.01 and 779.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.85 : 3,944.01 = 779.96 : x
2. Step 2: Convert to fraction form
   2,628.85/3,944.01 = 779.96/x
3. Step 3: Cross multiply
   2,628.85x = 3,944.01 × 779.96
4. Step 4: Simplify right side
   2,628.85x = 3,076,150.32
5. Step 5: Solve for x
   x = 3,076,150.32/2,628.85
6. Step 6: Final answer
   x = 1,170.15