Finding the Fourth Proportional to 3,418.44, 5,128.46 and 1,109.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,418.44 : 5,128.46 = 1,109.94 : x
2. Step 2: Convert to fraction form
   3,418.44/5,128.46 = 1,109.94/x
3. Step 3: Cross multiply
   3,418.44x = 5,128.46 × 1,109.94
4. Step 4: Simplify right side
   3,418.44x = 5,692,282.89
5. Step 5: Solve for x
   x = 5,692,282.89/3,418.44
6. Step 6: Final answer
   x = 1,665.17