Finding the Fourth Proportional to 3,429.54, 5,145.17 and 1,869.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,429.54 : 5,145.17 = 1,869.12 : x
2. Step 2: Convert to fraction form
   3,429.54/5,145.17 = 1,869.12/x
3. Step 3: Cross multiply
   3,429.54x = 5,145.17 × 1,869.12
4. Step 4: Simplify right side
   3,429.54x = 9,616,940.15
5. Step 5: Solve for x
   x = 9,616,940.15/3,429.54
6. Step 6: Final answer
   x = 2,804.15