Finding the Fourth Proportional to 2,621.77, 3,933.33 and 772.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.77 : 3,933.33 = 772.81 : x
2. Step 2: Convert to fraction form
   2,621.77/3,933.33 = 772.81/x
3. Step 3: Cross multiply
   2,621.77x = 3,933.33 × 772.81
4. Step 4: Simplify right side
   2,621.77x = 3,039,716.76
5. Step 5: Solve for x
   x = 3,039,716.76/2,621.77
6. Step 6: Final answer
   x = 1,159.41