Finding the Fourth Proportional to 1,406.01, 1,940.81 and 1,143.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.01 : 1,940.81 = 1,143.57 : x
2. Step 2: Convert to fraction form
   1,406.01/1,940.81 = 1,143.57/x
3. Step 3: Cross multiply
   1,406.01x = 1,940.81 × 1,143.57
4. Step 4: Simplify right side
   1,406.01x = 2,219,446.37
5. Step 5: Solve for x
   x = 2,219,446.37/1,406.01
6. Step 6: Final answer
   x = 1,578.54