Finding the Fourth Proportional to 2,171.62, 3,259.18 and 1,131.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.62 : 3,259.18 = 1,131.94 : x
2. Step 2: Convert to fraction form
   2,171.62/3,259.18 = 1,131.94/x
3. Step 3: Cross multiply
   2,171.62x = 3,259.18 × 1,131.94
4. Step 4: Simplify right side
   2,171.62x = 3,689,196.21
5. Step 5: Solve for x
   x = 3,689,196.21/2,171.62
6. Step 6: Final answer
   x = 1,698.82