Finding the Fourth Proportional to 1,019.38, 1,528.03 and 402.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.38 : 1,528.03 = 402.23 : x
2. Step 2: Convert to fraction form
   1,019.38/1,528.03 = 402.23/x
3. Step 3: Cross multiply
   1,019.38x = 1,528.03 × 402.23
4. Step 4: Simplify right side
   1,019.38x = 614,619.51
5. Step 5: Solve for x
   x = 614,619.51/1,019.38
6. Step 6: Final answer
   x = 602.93