Finding the Fourth Proportional to 1,117.27, 1,674.83 and 386.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,117.27 : 1,674.83 = 386.29 : x
2. Step 2: Convert to fraction form
   1,117.27/1,674.83 = 386.29/x
3. Step 3: Cross multiply
   1,117.27x = 1,674.83 × 386.29
4. Step 4: Simplify right side
   1,117.27x = 646,968.15
5. Step 5: Solve for x
   x = 646,968.15/1,117.27
6. Step 6: Final answer
   x = 579.06