Finding the Fourth Proportional to 2,131.98, 3,194.73 and 1,581.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.98 : 3,194.73 = 1,581.59 : x
2. Step 2: Convert to fraction form
   2,131.98/3,194.73 = 1,581.59/x
3. Step 3: Cross multiply
   2,131.98x = 3,194.73 × 1,581.59
4. Step 4: Simplify right side
   2,131.98x = 5,052,737.05
5. Step 5: Solve for x
   x = 5,052,737.05/2,131.98
6. Step 6: Final answer
   x = 2,369.97