Finding the Fourth Proportional to 2,486.82, 3,728.78 and 842.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,486.82 : 3,728.78 = 842.93 : x
2. Step 2: Convert to fraction form
   2,486.82/3,728.78 = 842.93/x
3. Step 3: Cross multiply
   2,486.82x = 3,728.78 × 842.93
4. Step 4: Simplify right side
   2,486.82x = 3,143,100.53
5. Step 5: Solve for x
   x = 3,143,100.53/2,486.82
6. Step 6: Final answer
   x = 1,263.90