Finding the Fourth Proportional to 1,441.12, 1,986.42 and 1,178.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.12 : 1,986.42 = 1,178.68 : x
2. Step 2: Convert to fraction form
   1,441.12/1,986.42 = 1,178.68/x
3. Step 3: Cross multiply
   1,441.12x = 1,986.42 × 1,178.68
4. Step 4: Simplify right side
   1,441.12x = 2,341,353.53
5. Step 5: Solve for x
   x = 2,341,353.53/1,441.12
6. Step 6: Final answer
   x = 1,624.68