Finding the Fourth Proportional to 2,280.56, 3,418.74 and 1,109.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.56 : 3,418.74 = 1,109.90 : x
2. Step 2: Convert to fraction form
   2,280.56/3,418.74 = 1,109.90/x
3. Step 3: Cross multiply
   2,280.56x = 3,418.74 × 1,109.90
4. Step 4: Simplify right side
   2,280.56x = 3,794,459.53
5. Step 5: Solve for x
   x = 3,794,459.53/2,280.56
6. Step 6: Final answer
   x = 1,663.83