Finding the Fourth Proportional to 1,397.47, 1,928.54 and 768.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.47 : 1,928.54 = 768.04 : x
2. Step 2: Convert to fraction form
   1,397.47/1,928.54 = 768.04/x
3. Step 3: Cross multiply
   1,397.47x = 1,928.54 × 768.04
4. Step 4: Simplify right side
   1,397.47x = 1,481,186.22
5. Step 5: Solve for x
   x = 1,481,186.22/1,397.47
6. Step 6: Final answer
   x = 1,059.91