Finding the Fourth Proportional to 2,075.56, 3,109.08 and 1,728.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.56 : 3,109.08 = 1,728.04 : x
2. Step 2: Convert to fraction form
   2,075.56/3,109.08 = 1,728.04/x
3. Step 3: Cross multiply
   2,075.56x = 3,109.08 × 1,728.04
4. Step 4: Simplify right side
   2,075.56x = 5,372,614.60
5. Step 5: Solve for x
   x = 5,372,614.60/2,075.56
6. Step 6: Final answer
   x = 2,588.51