Finding the Fourth Proportional to 3,449.61, 5,174.33 and 1,109.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,449.61 : 5,174.33 = 1,109.78 : x
2. Step 2: Convert to fraction form
   3,449.61/5,174.33 = 1,109.78/x
3. Step 3: Cross multiply
   3,449.61x = 5,174.33 × 1,109.78
4. Step 4: Simplify right side
   3,449.61x = 5,742,336.53
5. Step 5: Solve for x
   x = 5,742,336.53/3,449.61
6. Step 6: Final answer
   x = 1,664.63