Finding the Fourth Proportional to 1,405.27, 1,940.04 and 845.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.27 : 1,940.04 = 845.87 : x
2. Step 2: Convert to fraction form
   1,405.27/1,940.04 = 845.87/x
3. Step 3: Cross multiply
   1,405.27x = 1,940.04 × 845.87
4. Step 4: Simplify right side
   1,405.27x = 1,641,021.63
5. Step 5: Solve for x
   x = 1,641,021.63/1,405.27
6. Step 6: Final answer
   x = 1,167.76