Finding the Fourth Proportional to 1,030.16, 1,544.52 and 380.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.16 : 1,544.52 = 380.72 : x
2. Step 2: Convert to fraction form
   1,030.16/1,544.52 = 380.72/x
3. Step 3: Cross multiply
   1,030.16x = 1,544.52 × 380.72
4. Step 4: Simplify right side
   1,030.16x = 588,029.65
5. Step 5: Solve for x
   x = 588,029.65/1,030.16
6. Step 6: Final answer
   x = 570.81