Finding the Fourth Proportional to 2,119.55, 3,179.34 and 1,253.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,119.55 : 3,179.34 = 1,253.25 : x
2. Step 2: Convert to fraction form
   2,119.55/3,179.34 = 1,253.25/x
3. Step 3: Cross multiply
   2,119.55x = 3,179.34 × 1,253.25
4. Step 4: Simplify right side
   2,119.55x = 3,984,507.86
5. Step 5: Solve for x
   x = 3,984,507.86/2,119.55
6. Step 6: Final answer
   x = 1,879.89