Finding the Fourth Proportional to 1,086.59, 1,626.24 and 996.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.59 : 1,626.24 = 996.68 : x
2. Step 2: Convert to fraction form
   1,086.59/1,626.24 = 996.68/x
3. Step 3: Cross multiply
   1,086.59x = 1,626.24 × 996.68
4. Step 4: Simplify right side
   1,086.59x = 1,620,840.88
5. Step 5: Solve for x
   x = 1,620,840.88/1,086.59
6. Step 6: Final answer
   x = 1,491.68