Finding the Fourth Proportional to 1,786.63, 2,466.86 and 1,290.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,786.63 : 2,466.86 = 1,290.37 : x
2. Step 2: Convert to fraction form
   1,786.63/2,466.86 = 1,290.37/x
3. Step 3: Cross multiply
   1,786.63x = 2,466.86 × 1,290.37
4. Step 4: Simplify right side
   1,786.63x = 3,183,162.14
5. Step 5: Solve for x
   x = 3,183,162.14/1,786.63
6. Step 6: Final answer
   x = 1,781.66