Finding the Fourth Proportional to 1,036.37, 1,554.50 and 387.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.37 : 1,554.50 = 387.05 : x
2. Step 2: Convert to fraction form
   1,036.37/1,554.50 = 387.05/x
3. Step 3: Cross multiply
   1,036.37x = 1,554.50 × 387.05
4. Step 4: Simplify right side
   1,036.37x = 601,659.52
5. Step 5: Solve for x
   x = 601,659.52/1,036.37
6. Step 6: Final answer
   x = 580.55