Finding the Fourth Proportional to 3,040.72, 4,196.20 and 1,781.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,040.72 : 4,196.20 = 1,781.80 : x
2. Step 2: Convert to fraction form
   3,040.72/4,196.20 = 1,781.80/x
3. Step 3: Cross multiply
   3,040.72x = 4,196.20 × 1,781.80
4. Step 4: Simplify right side
   3,040.72x = 7,476,789.16
5. Step 5: Solve for x
   x = 7,476,789.16/3,040.72
6. Step 6: Final answer
   x = 2,458.89