Finding the Fourth Proportional to 1,168.28, 1,752.69 and 388.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.28 : 1,752.69 = 388.22 : x
2. Step 2: Convert to fraction form
   1,168.28/1,752.69 = 388.22/x
3. Step 3: Cross multiply
   1,168.28x = 1,752.69 × 388.22
4. Step 4: Simplify right side
   1,168.28x = 680,429.31
5. Step 5: Solve for x
   x = 680,429.31/1,168.28
6. Step 6: Final answer
   x = 582.42