Finding the Fourth Proportional to 1,076.77, 1,485.40 and 683.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.77 : 1,485.40 = 683.17 : x
2. Step 2: Convert to fraction form
   1,076.77/1,485.40 = 683.17/x
3. Step 3: Cross multiply
   1,076.77x = 1,485.40 × 683.17
4. Step 4: Simplify right side
   1,076.77x = 1,014,780.72
5. Step 5: Solve for x
   x = 1,014,780.72/1,076.77
6. Step 6: Final answer
   x = 942.43