Finding the Fourth Proportional to 2,749.30, 4,121.52 and 1,290.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,749.30 : 4,121.52 = 1,290.22 : x
2. Step 2: Convert to fraction form
   2,749.30/4,121.52 = 1,290.22/x
3. Step 3: Cross multiply
   2,749.30x = 4,121.52 × 1,290.22
4. Step 4: Simplify right side
   2,749.30x = 5,317,667.53
5. Step 5: Solve for x
   x = 5,317,667.53/2,749.30
6. Step 6: Final answer
   x = 1,934.19