Finding the Fourth Proportional to 1,442.04, 1,980.43 and 1,208.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.04 : 1,980.43 = 1,208.76 : x
2. Step 2: Convert to fraction form
   1,442.04/1,980.43 = 1,208.76/x
3. Step 3: Cross multiply
   1,442.04x = 1,980.43 × 1,208.76
4. Step 4: Simplify right side
   1,442.04x = 2,393,864.57
5. Step 5: Solve for x
   x = 2,393,864.57/1,442.04
6. Step 6: Final answer
   x = 1,660.05