Finding the Fourth Proportional to 2,111.40, 3,166.76 and 1,329

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.40 : 3,166.76 = 1,329 : x
2. Step 2: Convert to fraction form
   2,111.40/3,166.76 = 1,329/x
3. Step 3: Cross multiply
   2,111.40x = 3,166.76 × 1,329
4. Step 4: Simplify right side
   2,111.40x = 4,208,624.04
5. Step 5: Solve for x
   x = 4,208,624.04/2,111.40
6. Step 6: Final answer
   x = 1,993.29