Finding the Fourth Proportional to 1,020.17, 1,530.39 and 370.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020.17 : 1,530.39 = 370.69 : x
2. Step 2: Convert to fraction form
   1,020.17/1,530.39 = 370.69/x
3. Step 3: Cross multiply
   1,020.17x = 1,530.39 × 370.69
4. Step 4: Simplify right side
   1,020.17x = 567,300.27
5. Step 5: Solve for x
   x = 567,300.27/1,020.17
6. Step 6: Final answer
   x = 556.08