Finding the Fourth Proportional to 2,390.82, 3,587.45 and 1,092.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.82 : 3,587.45 = 1,092.12 : x
2. Step 2: Convert to fraction form
   2,390.82/3,587.45 = 1,092.12/x
3. Step 3: Cross multiply
   2,390.82x = 3,587.45 × 1,092.12
4. Step 4: Simplify right side
   2,390.82x = 3,917,920.43
5. Step 5: Solve for x
   x = 3,917,920.43/2,390.82
6. Step 6: Final answer
   x = 1,638.74