Finding the Fourth Proportional to 2,553.61, 3,523.91 and 1,434.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,553.61 : 3,523.91 = 1,434.55 : x
2. Step 2: Convert to fraction form
   2,553.61/3,523.91 = 1,434.55/x
3. Step 3: Cross multiply
   2,553.61x = 3,523.91 × 1,434.55
4. Step 4: Simplify right side
   2,553.61x = 5,055,217.92
5. Step 5: Solve for x
   x = 5,055,217.92/2,553.61
6. Step 6: Final answer
   x = 1,979.64