Finding the Fourth Proportional to 1,146.04, 1,581.54 and 680.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.04 : 1,581.54 = 680.28 : x
2. Step 2: Convert to fraction form
   1,146.04/1,581.54 = 680.28/x
3. Step 3: Cross multiply
   1,146.04x = 1,581.54 × 680.28
4. Step 4: Simplify right side
   1,146.04x = 1,075,890.03
5. Step 5: Solve for x
   x = 1,075,890.03/1,146.04
6. Step 6: Final answer
   x = 938.79