Finding the Fourth Proportional to 1,380.16, 2,067.30 and 1,104.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.16 : 2,067.30 = 1,104.76 : x
2. Step 2: Convert to fraction form
   1,380.16/2,067.30 = 1,104.76/x
3. Step 3: Cross multiply
   1,380.16x = 2,067.30 × 1,104.76
4. Step 4: Simplify right side
   1,380.16x = 2,283,870.35
5. Step 5: Solve for x
   x = 2,283,870.35/1,380.16
6. Step 6: Final answer
   x = 1,654.79