Finding the Fourth Proportional to 3,521.23, 4,859.72 and 2,261.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,521.23 : 4,859.72 = 2,261.82 : x
2. Step 2: Convert to fraction form
   3,521.23/4,859.72 = 2,261.82/x
3. Step 3: Cross multiply
   3,521.23x = 4,859.72 × 2,261.82
4. Step 4: Simplify right side
   3,521.23x = 10,991,811.89
5. Step 5: Solve for x
   x = 10,991,811.89/3,521.23
6. Step 6: Final answer
   x = 3,121.58