Finding the Fourth Proportional to 1,491.78, 2,059.59 and 1,043.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.78 : 2,059.59 = 1,043.49 : x
2. Step 2: Convert to fraction form
   1,491.78/2,059.59 = 1,043.49/x
3. Step 3: Cross multiply
   1,491.78x = 2,059.59 × 1,043.49
4. Step 4: Simplify right side
   1,491.78x = 2,149,161.57
5. Step 5: Solve for x
   x = 2,149,161.57/1,491.78
6. Step 6: Final answer
   x = 1,440.67