Finding the Fourth Proportional to 1,037.69, 1,555.98 and 387.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,037.69 : 1,555.98 = 387.89 : x
2. Step 2: Convert to fraction form
   1,037.69/1,555.98 = 387.89/x
3. Step 3: Cross multiply
   1,037.69x = 1,555.98 × 387.89
4. Step 4: Simplify right side
   1,037.69x = 603,541.30
5. Step 5: Solve for x
   x = 603,541.30/1,037.69
6. Step 6: Final answer
   x = 581.62