Finding the Fourth Proportional to 2,577.10, 3,556.38 and 1,398.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.10 : 3,556.38 = 1,398.18 : x
2. Step 2: Convert to fraction form
   2,577.10/3,556.38 = 1,398.18/x
3. Step 3: Cross multiply
   2,577.10x = 3,556.38 × 1,398.18
4. Step 4: Simplify right side
   2,577.10x = 4,972,459.39
5. Step 5: Solve for x
   x = 4,972,459.39/2,577.10
6. Step 6: Final answer
   x = 1,929.48