Finding the Fourth Proportional to 2,576.93, 3,556.05 and 1,398.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.93 : 3,556.05 = 1,398.02 : x
2. Step 2: Convert to fraction form
   2,576.93/3,556.05 = 1,398.02/x
3. Step 3: Cross multiply
   2,576.93x = 3,556.05 × 1,398.02
4. Step 4: Simplify right side
   2,576.93x = 4,971,429.02
5. Step 5: Solve for x
   x = 4,971,429.02/2,576.93
6. Step 6: Final answer
   x = 1,929.21