Finding the Fourth Proportional to 1,150.59, 1,725.71 and 381.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.59 : 1,725.71 = 381.09 : x
2. Step 2: Convert to fraction form
   1,150.59/1,725.71 = 381.09/x
3. Step 3: Cross multiply
   1,150.59x = 1,725.71 × 381.09
4. Step 4: Simplify right side
   1,150.59x = 657,648.92
5. Step 5: Solve for x
   x = 657,648.92/1,150.59
6. Step 6: Final answer
   x = 571.58