Finding the Fourth Proportional to 1,018.77, 1,528.29 and 369.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.77 : 1,528.29 = 369.42 : x
2. Step 2: Convert to fraction form
   1,018.77/1,528.29 = 369.42/x
3. Step 3: Cross multiply
   1,018.77x = 1,528.29 × 369.42
4. Step 4: Simplify right side
   1,018.77x = 564,580.89
5. Step 5: Solve for x
   x = 564,580.89/1,018.77
6. Step 6: Final answer
   x = 554.18