Finding the Fourth Proportional to 2,971.33, 4,456.96 and 1,239.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,971.33 : 4,456.96 = 1,239.55 : x
2. Step 2: Convert to fraction form
   2,971.33/4,456.96 = 1,239.55/x
3. Step 3: Cross multiply
   2,971.33x = 4,456.96 × 1,239.55
4. Step 4: Simplify right side
   2,971.33x = 5,524,624.77
5. Step 5: Solve for x
   x = 5,524,624.77/2,971.33
6. Step 6: Final answer
   x = 1,859.31