Finding the Fourth Proportional to 2,379.92, 3,569.12 and 1,209.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.92 : 3,569.12 = 1,209.52 : x
2. Step 2: Convert to fraction form
   2,379.92/3,569.12 = 1,209.52/x
3. Step 3: Cross multiply
   2,379.92x = 3,569.12 × 1,209.52
4. Step 4: Simplify right side
   2,379.92x = 4,316,922.02
5. Step 5: Solve for x
   x = 4,316,922.02/2,379.92
6. Step 6: Final answer
   x = 1,813.89