Finding the Fourth Proportional to 2,556.37, 3,526.77 and 1,611.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.37 : 3,526.77 = 1,611.91 : x
2. Step 2: Convert to fraction form
   2,556.37/3,526.77 = 1,611.91/x
3. Step 3: Cross multiply
   2,556.37x = 3,526.77 × 1,611.91
4. Step 4: Simplify right side
   2,556.37x = 5,684,835.83
5. Step 5: Solve for x
   x = 5,684,835.83/2,556.37
6. Step 6: Final answer
   x = 2,223.79