Finding the Fourth Proportional to 2,671.40, 4,003.36 and 1,109.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,671.40 : 4,003.36 = 1,109.72 : x
2. Step 2: Convert to fraction form
   2,671.40/4,003.36 = 1,109.72/x
3. Step 3: Cross multiply
   2,671.40x = 4,003.36 × 1,109.72
4. Step 4: Simplify right side
   2,671.40x = 4,442,615.89
5. Step 5: Solve for x
   x = 4,442,615.89/2,671.40
6. Step 6: Final answer
   x = 1,663.03