Finding the Fourth Proportional to 1,304.72, 1,956.61 and 380.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,304.72 : 1,956.61 = 380.03 : x
2. Step 2: Convert to fraction form
   1,304.72/1,956.61 = 380.03/x
3. Step 3: Cross multiply
   1,304.72x = 1,956.61 × 380.03
4. Step 4: Simplify right side
   1,304.72x = 743,559.77
5. Step 5: Solve for x
   x = 743,559.77/1,304.72
6. Step 6: Final answer
   x = 569.90