Finding the Fourth Proportional to 1,036.76, 1,554.72 and 387.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.76 : 1,554.72 = 387.04 : x
2. Step 2: Convert to fraction form
   1,036.76/1,554.72 = 387.04/x
3. Step 3: Cross multiply
   1,036.76x = 1,554.72 × 387.04
4. Step 4: Simplify right side
   1,036.76x = 601,738.83
5. Step 5: Solve for x
   x = 601,738.83/1,036.76
6. Step 6: Final answer
   x = 580.40