Finding the Fourth Proportional to 2,553.21, 3,522.78 and 1,434.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,553.21 : 3,522.78 = 1,434.08 : x
2. Step 2: Convert to fraction form
   2,553.21/3,522.78 = 1,434.08/x
3. Step 3: Cross multiply
   2,553.21x = 3,522.78 × 1,434.08
4. Step 4: Simplify right side
   2,553.21x = 5,051,945.22
5. Step 5: Solve for x
   x = 5,051,945.22/2,553.21
6. Step 6: Final answer
   x = 1,978.67