Finding the Fourth Proportional to 1,362.72, 2,041.92 and 1,055.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.72 : 2,041.92 = 1,055.40 : x
2. Step 2: Convert to fraction form
   1,362.72/2,041.92 = 1,055.40/x
3. Step 3: Cross multiply
   1,362.72x = 2,041.92 × 1,055.40
4. Step 4: Simplify right side
   1,362.72x = 2,155,042.37
5. Step 5: Solve for x
   x = 2,155,042.37/1,362.72
6. Step 6: Final answer
   x = 1,581.43