Finding the Fourth Proportional to 2,284.90, 3,153.17 and 1,290.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,284.90 : 3,153.17 = 1,290.37 : x
2. Step 2: Convert to fraction form
   2,284.90/3,153.17 = 1,290.37/x
3. Step 3: Cross multiply
   2,284.90x = 3,153.17 × 1,290.37
4. Step 4: Simplify right side
   2,284.90x = 4,068,755.97
5. Step 5: Solve for x
   x = 4,068,755.97/2,284.90
6. Step 6: Final answer
   x = 1,780.72