Finding the Fourth Proportional to 2,601.81, 3,581.69 and 2,011.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,601.81 : 3,581.69 = 2,011.23 : x
2. Step 2: Convert to fraction form
   2,601.81/3,581.69 = 2,011.23/x
3. Step 3: Cross multiply
   2,601.81x = 3,581.69 × 2,011.23
4. Step 4: Simplify right side
   2,601.81x = 7,203,592.32
5. Step 5: Solve for x
   x = 7,203,592.32/2,601.81
6. Step 6: Final answer
   x = 2,768.69