Finding the Fourth Proportional to 2,553.50, 3,523.84 and 1,434.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,553.50 : 3,523.84 = 1,434.40 : x
2. Step 2: Convert to fraction form
   2,553.50/3,523.84 = 1,434.40/x
3. Step 3: Cross multiply
   2,553.50x = 3,523.84 × 1,434.40
4. Step 4: Simplify right side
   2,553.50x = 5,054,596.10
5. Step 5: Solve for x
   x = 5,054,596.10/2,553.50
6. Step 6: Final answer
   x = 1,979.48