Finding the Fourth Proportional to 1,168.56, 1,752.42 and 388.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.56 : 1,752.42 = 388.43 : x
2. Step 2: Convert to fraction form
   1,168.56/1,752.42 = 388.43/x
3. Step 3: Cross multiply
   1,168.56x = 1,752.42 × 388.43
4. Step 4: Simplify right side
   1,168.56x = 680,692.50
5. Step 5: Solve for x
   x = 680,692.50/1,168.56
6. Step 6: Final answer
   x = 582.51