Finding the Fourth Proportional to 2,553.45, 3,523.55 and 1,434.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,553.45 : 3,523.55 = 1,434.30 : x
2. Step 2: Convert to fraction form
   2,553.45/3,523.55 = 1,434.30/x
3. Step 3: Cross multiply
   2,553.45x = 3,523.55 × 1,434.30
4. Step 4: Simplify right side
   2,553.45x = 5,053,820.59
5. Step 5: Solve for x
   x = 5,053,820.59/2,553.45
6. Step 6: Final answer
   x = 1,979.21