Finding the Fourth Proportional to 1,440.89, 2,159.46 and 1,093.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.89 : 2,159.46 = 1,093.20 : x
2. Step 2: Convert to fraction form
   1,440.89/2,159.46 = 1,093.20/x
3. Step 3: Cross multiply
   1,440.89x = 2,159.46 × 1,093.20
4. Step 4: Simplify right side
   1,440.89x = 2,360,713.57
5. Step 5: Solve for x
   x = 2,360,713.57/1,440.89
6. Step 6: Final answer
   x = 1,638.37