Finding the Fourth Proportional to 2,131.85, 3,194.81 and 1,611.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.85 : 3,194.81 = 1,611.42 : x
2. Step 2: Convert to fraction form
   2,131.85/3,194.81 = 1,611.42/x
3. Step 3: Cross multiply
   2,131.85x = 3,194.81 × 1,611.42
4. Step 4: Simplify right side
   2,131.85x = 5,148,172.67
5. Step 5: Solve for x
   x = 5,148,172.67/2,131.85
6. Step 6: Final answer
   x = 2,414.89