Finding the Fourth Proportional to 3,418.50, 5,128.47 and 1,110.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,418.50 : 5,128.47 = 1,110.18 : x
2. Step 2: Convert to fraction form
   3,418.50/5,128.47 = 1,110.18/x
3. Step 3: Cross multiply
   3,418.50x = 5,128.47 × 1,110.18
4. Step 4: Simplify right side
   3,418.50x = 5,693,524.82
5. Step 5: Solve for x
   x = 5,693,524.82/3,418.50
6. Step 6: Final answer
   x = 1,665.50