Finding the Fourth Proportional to 1,362.08, 1,879.69 and 1,020.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.08 : 1,879.69 = 1,020.79 : x
2. Step 2: Convert to fraction form
   1,362.08/1,879.69 = 1,020.79/x
3. Step 3: Cross multiply
   1,362.08x = 1,879.69 × 1,020.79
4. Step 4: Simplify right side
   1,362.08x = 1,918,768.76
5. Step 5: Solve for x
   x = 1,918,768.76/1,362.08
6. Step 6: Final answer
   x = 1,408.70