Finding the Fourth Proportional to 2,852.61, 4,279.37 and 1,209.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,852.61 : 4,279.37 = 1,209.17 : x
2. Step 2: Convert to fraction form
   2,852.61/4,279.37 = 1,209.17/x
3. Step 3: Cross multiply
   2,852.61x = 4,279.37 × 1,209.17
4. Step 4: Simplify right side
   2,852.61x = 5,174,458.38
5. Step 5: Solve for x
   x = 5,174,458.38/2,852.61
6. Step 6: Final answer
   x = 1,813.94