Finding the Fourth Proportional to 1,491.40, 2,059.86 and 1,405

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.40 : 2,059.86 = 1,405 : x
2. Step 2: Convert to fraction form
   1,491.40/2,059.86 = 1,405/x
3. Step 3: Cross multiply
   1,491.40x = 2,059.86 × 1,405
4. Step 4: Simplify right side
   1,491.40x = 2,894,103.30
5. Step 5: Solve for x
   x = 2,894,103.30/1,491.40
6. Step 6: Final answer
   x = 1,940.53