Finding the Fourth Proportional to 2,940.48, 4,410.96 and 1,209.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,940.48 : 4,410.96 = 1,209.12 : x
2. Step 2: Convert to fraction form
   2,940.48/4,410.96 = 1,209.12/x
3. Step 3: Cross multiply
   2,940.48x = 4,410.96 × 1,209.12
4. Step 4: Simplify right side
   2,940.48x = 5,333,379.96
5. Step 5: Solve for x
   x = 5,333,379.96/2,940.48
6. Step 6: Final answer
   x = 1,813.78