Finding the Fourth Proportional to 2,577.24, 3,556.61 and 1,398.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.24 : 3,556.61 = 1,398.33 : x
2. Step 2: Convert to fraction form
   2,577.24/3,556.61 = 1,398.33/x
3. Step 3: Cross multiply
   2,577.24x = 3,556.61 × 1,398.33
4. Step 4: Simplify right side
   2,577.24x = 4,973,312.71
5. Step 5: Solve for x
   x = 4,973,312.71/2,577.24
6. Step 6: Final answer
   x = 1,929.71