Finding the Fourth Proportional to 2,553.40, 3,523.86 and 1,434.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,553.40 : 3,523.86 = 1,434.42 : x
2. Step 2: Convert to fraction form
   2,553.40/3,523.86 = 1,434.42/x
3. Step 3: Cross multiply
   2,553.40x = 3,523.86 × 1,434.42
4. Step 4: Simplify right side
   2,553.40x = 5,054,695.26
5. Step 5: Solve for x
   x = 5,054,695.26/2,553.40
6. Step 6: Final answer
   x = 1,979.59