Finding the Fourth Proportional to 2,911.72, 4,360.59 and 2,561.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,911.72 : 4,360.59 = 2,561.49 : x
2. Step 2: Convert to fraction form
   2,911.72/4,360.59 = 2,561.49/x
3. Step 3: Cross multiply
   2,911.72x = 4,360.59 × 2,561.49
4. Step 4: Simplify right side
   2,911.72x = 11,169,624.03
5. Step 5: Solve for x
   x = 11,169,624.03/2,911.72
6. Step 6: Final answer
   x = 3,836.09