Finding the Fourth Proportional to 1,434.51, 2,147.58 and 1,089.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.51 : 2,147.58 = 1,089.27 : x
2. Step 2: Convert to fraction form
   1,434.51/2,147.58 = 1,089.27/x
3. Step 3: Cross multiply
   1,434.51x = 2,147.58 × 1,089.27
4. Step 4: Simplify right side
   1,434.51x = 2,339,294.47
5. Step 5: Solve for x
   x = 2,339,294.47/1,434.51
6. Step 6: Final answer
   x = 1,630.73