Finding the Fourth Proportional to 1,180.10, 1,628.55 and 682.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,180.10 : 1,628.55 = 682.79 : x
2. Step 2: Convert to fraction form
   1,180.10/1,628.55 = 682.79/x
3. Step 3: Cross multiply
   1,180.10x = 1,628.55 × 682.79
4. Step 4: Simplify right side
   1,180.10x = 1,111,949.51
5. Step 5: Solve for x
   x = 1,111,949.51/1,180.10
6. Step 6: Final answer
   x = 942.25