Finding the Fourth Proportional to 2,235.46, 3,084.74 and 1,290.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,235.46 : 3,084.74 = 1,290.82 : x
2. Step 2: Convert to fraction form
   2,235.46/3,084.74 = 1,290.82/x
3. Step 3: Cross multiply
   2,235.46x = 3,084.74 × 1,290.82
4. Step 4: Simplify right side
   2,235.46x = 3,981,844.09
5. Step 5: Solve for x
   x = 3,981,844.09/2,235.46
6. Step 6: Final answer
   x = 1,781.22