Finding the Fourth Proportional to 2,059.80, 3,089.79 and 1,329.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.80 : 3,089.79 = 1,329.90 : x
2. Step 2: Convert to fraction form
   2,059.80/3,089.79 = 1,329.90/x
3. Step 3: Cross multiply
   2,059.80x = 3,089.79 × 1,329.90
4. Step 4: Simplify right side
   2,059.80x = 4,109,111.72
5. Step 5: Solve for x
   x = 4,109,111.72/2,059.80
6. Step 6: Final answer
   x = 1,994.91