Finding the Fourth Proportional to 2,556.88, 3,835.62 and 913.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.88 : 3,835.62 = 913.58 : x
2. Step 2: Convert to fraction form
   2,556.88/3,835.62 = 913.58/x
3. Step 3: Cross multiply
   2,556.88x = 3,835.62 × 913.58
4. Step 4: Simplify right side
   2,556.88x = 3,504,145.72
5. Step 5: Solve for x
   x = 3,504,145.72/2,556.88
6. Step 6: Final answer
   x = 1,370.48