Finding the Fourth Proportional to 1,019.34, 1,528.89 and 361.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.34 : 1,528.89 = 361.11 : x
2. Step 2: Convert to fraction form
   1,019.34/1,528.89 = 361.11/x
3. Step 3: Cross multiply
   1,019.34x = 1,528.89 × 361.11
4. Step 4: Simplify right side
   1,019.34x = 552,097.47
5. Step 5: Solve for x
   x = 552,097.47/1,019.34
6. Step 6: Final answer
   x = 541.62