Finding the Fourth Proportional to 2,390.25, 3,586.79 and 1,091.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.25 : 3,586.79 = 1,091.82 : x
2. Step 2: Convert to fraction form
   2,390.25/3,586.79 = 1,091.82/x
3. Step 3: Cross multiply
   2,390.25x = 3,586.79 × 1,091.82
4. Step 4: Simplify right side
   2,390.25x = 3,916,131.79
5. Step 5: Solve for x
   x = 3,916,131.79/2,390.25
6. Step 6: Final answer
   x = 1,638.38