Finding the Fourth Proportional to 2,576.98, 3,556.24 and 1,398.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.98 : 3,556.24 = 1,398.06 : x
2. Step 2: Convert to fraction form
   2,576.98/3,556.24 = 1,398.06/x
3. Step 3: Cross multiply
   2,576.98x = 3,556.24 × 1,398.06
4. Step 4: Simplify right side
   2,576.98x = 4,971,836.89
5. Step 5: Solve for x
   x = 4,971,836.89/2,576.98
6. Step 6: Final answer
   x = 1,929.33