Finding the Fourth Proportional to 1,789.19, 2,466.72 and 1,290.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.19 : 2,466.72 = 1,290.27 : x
2. Step 2: Convert to fraction form
   1,789.19/2,466.72 = 1,290.27/x
3. Step 3: Cross multiply
   1,789.19x = 2,466.72 × 1,290.27
4. Step 4: Simplify right side
   1,789.19x = 3,182,734.81
5. Step 5: Solve for x
   x = 3,182,734.81/1,789.19
6. Step 6: Final answer
   x = 1,778.87