Finding the Fourth Proportional to 1,168.65, 1,748.82 and 839.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.65 : 1,748.82 = 839.91 : x
2. Step 2: Convert to fraction form
   1,168.65/1,748.82 = 839.91/x
3. Step 3: Cross multiply
   1,168.65x = 1,748.82 × 839.91
4. Step 4: Simplify right side
   1,168.65x = 1,468,851.41
5. Step 5: Solve for x
   x = 1,468,851.41/1,168.65
6. Step 6: Final answer
   x = 1,256.88