Finding the Fourth Proportional to 3,189.39, 4,782.72 and 1,240.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,189.39 : 4,782.72 = 1,240.23 : x
2. Step 2: Convert to fraction form
   3,189.39/4,782.72 = 1,240.23/x
3. Step 3: Cross multiply
   3,189.39x = 4,782.72 × 1,240.23
4. Step 4: Simplify right side
   3,189.39x = 5,931,672.83
5. Step 5: Solve for x
   x = 5,931,672.83/3,189.39
6. Step 6: Final answer
   x = 1,859.81