Finding the Fourth Proportional to 1,397.66, 1,928.82 and 768.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.66 : 1,928.82 = 768.25 : x
2. Step 2: Convert to fraction form
   1,397.66/1,928.82 = 768.25/x
3. Step 3: Cross multiply
   1,397.66x = 1,928.82 × 768.25
4. Step 4: Simplify right side
   1,397.66x = 1,481,806.32
5. Step 5: Solve for x
   x = 1,481,806.32/1,397.66
6. Step 6: Final answer
   x = 1,060.21