Finding the Fourth Proportional to 3,498.78, 4,828.42 and 1,905.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,498.78 : 4,828.42 = 1,905.53 : x
2. Step 2: Convert to fraction form
   3,498.78/4,828.42 = 1,905.53/x
3. Step 3: Cross multiply
   3,498.78x = 4,828.42 × 1,905.53
4. Step 4: Simplify right side
   3,498.78x = 9,200,699.16
5. Step 5: Solve for x
   x = 9,200,699.16/3,498.78
6. Step 6: Final answer
   x = 2,629.69