Finding the Fourth Proportional to 1,019.34, 1,528.02 and 369.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.34 : 1,528.02 = 369.72 : x
2. Step 2: Convert to fraction form
   1,019.34/1,528.02 = 369.72/x
3. Step 3: Cross multiply
   1,019.34x = 1,528.02 × 369.72
4. Step 4: Simplify right side
   1,019.34x = 564,939.55
5. Step 5: Solve for x
   x = 564,939.55/1,019.34
6. Step 6: Final answer
   x = 554.22