Finding the Fourth Proportional to 2,853.90, 4,279.83 and 1,210.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,853.90 : 4,279.83 = 1,210.56 : x
2. Step 2: Convert to fraction form
   2,853.90/4,279.83 = 1,210.56/x
3. Step 3: Cross multiply
   2,853.90x = 4,279.83 × 1,210.56
4. Step 4: Simplify right side
   2,853.90x = 5,180,991.00
5. Step 5: Solve for x
   x = 5,180,991.00/2,853.90
6. Step 6: Final answer
   x = 1,815.41