Finding the Fourth Proportional to 2,159.73, 3,238.49 and 772.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159.73 : 3,238.49 = 772.83 : x
2. Step 2: Convert to fraction form
   2,159.73/3,238.49 = 772.83/x
3. Step 3: Cross multiply
   2,159.73x = 3,238.49 × 772.83
4. Step 4: Simplify right side
   2,159.73x = 2,502,804.16
5. Step 5: Solve for x
   x = 2,502,804.16/2,159.73
6. Step 6: Final answer
   x = 1,158.85