Finding the Fourth Proportional to 1,150.50, 1,725.79 and 380.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.50 : 1,725.79 = 380.98 : x
2. Step 2: Convert to fraction form
   1,150.50/1,725.79 = 380.98/x
3. Step 3: Cross multiply
   1,150.50x = 1,725.79 × 380.98
4. Step 4: Simplify right side
   1,150.50x = 657,491.47
5. Step 5: Solve for x
   x = 657,491.47/1,150.50
6. Step 6: Final answer
   x = 571.48