Finding the Fourth Proportional to 2,085.89, 2,879.64 and 1,330.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.89 : 2,879.64 = 1,330.43 : x
2. Step 2: Convert to fraction form
   2,085.89/2,879.64 = 1,330.43/x
3. Step 3: Cross multiply
   2,085.89x = 2,879.64 × 1,330.43
4. Step 4: Simplify right side
   2,085.89x = 3,831,145.05
5. Step 5: Solve for x
   x = 3,831,145.05/2,085.89
6. Step 6: Final answer
   x = 1,836.70