Finding the Fourth Proportional to 2,577.50, 3,556.94 and 1,398.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.50 : 3,556.94 = 1,398.56 : x
2. Step 2: Convert to fraction form
   2,577.50/3,556.94 = 1,398.56/x
3. Step 3: Cross multiply
   2,577.50x = 3,556.94 × 1,398.56
4. Step 4: Simplify right side
   2,577.50x = 4,974,594.01
5. Step 5: Solve for x
   x = 4,974,594.01/2,577.50
6. Step 6: Final answer
   x = 1,930.01