Finding the Fourth Proportional to 2,144.67, 3,219.93 and 1,105.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.67 : 3,219.93 = 1,105.53 : x
2. Step 2: Convert to fraction form
   2,144.67/3,219.93 = 1,105.53/x
3. Step 3: Cross multiply
   2,144.67x = 3,219.93 × 1,105.53
4. Step 4: Simplify right side
   2,144.67x = 3,559,729.21
5. Step 5: Solve for x
   x = 3,559,729.21/2,144.67
6. Step 6: Final answer
   x = 1,659.80