Finding the Fourth Proportional to 2,556.96, 3,528.50 and 1,438.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.96 : 3,528.50 = 1,438.08 : x
2. Step 2: Convert to fraction form
   2,556.96/3,528.50 = 1,438.08/x
3. Step 3: Cross multiply
   2,556.96x = 3,528.50 × 1,438.08
4. Step 4: Simplify right side
   2,556.96x = 5,074,265.28
5. Step 5: Solve for x
   x = 5,074,265.28/2,556.96
6. Step 6: Final answer
   x = 1,984.49