Finding the Fourth Proportional to 2,553.68, 3,523.88 and 1,434.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,553.68 : 3,523.88 = 1,434.78 : x
2. Step 2: Convert to fraction form
   2,553.68/3,523.88 = 1,434.78/x
3. Step 3: Cross multiply
   2,553.68x = 3,523.88 × 1,434.78
4. Step 4: Simplify right side
   2,553.68x = 5,055,992.55
5. Step 5: Solve for x
   x = 5,055,992.55/2,553.68
6. Step 6: Final answer
   x = 1,979.88