Finding the Fourth Proportional to 2,109.63, 3,164.49 and 1,383.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.63 : 3,164.49 = 1,383.81 : x
2. Step 2: Convert to fraction form
   2,109.63/3,164.49 = 1,383.81/x
3. Step 3: Cross multiply
   2,109.63x = 3,164.49 × 1,383.81
4. Step 4: Simplify right side
   2,109.63x = 4,379,052.91
5. Step 5: Solve for x
   x = 4,379,052.91/2,109.63
6. Step 6: Final answer
   x = 2,075.74