Finding the Fourth Proportional to 1,168.32, 1,748.16 and 839.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.32 : 1,748.16 = 839.28 : x
2. Step 2: Convert to fraction form
   1,168.32/1,748.16 = 839.28/x
3. Step 3: Cross multiply
   1,168.32x = 1,748.16 × 839.28
4. Step 4: Simplify right side
   1,168.32x = 1,467,195.72
5. Step 5: Solve for x
   x = 1,467,195.72/1,168.32
6. Step 6: Final answer
   x = 1,255.82