Finding the Fourth Proportional to 2,577.39, 3,556.83 and 1,398.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.39 : 3,556.83 = 1,398.47 : x
2. Step 2: Convert to fraction form
   2,577.39/3,556.83 = 1,398.47/x
3. Step 3: Cross multiply
   2,577.39x = 3,556.83 × 1,398.47
4. Step 4: Simplify right side
   2,577.39x = 4,974,113.06
5. Step 5: Solve for x
   x = 4,974,113.06/2,577.39
6. Step 6: Final answer
   x = 1,929.90