Finding the Fourth Proportional to 1,086.69, 1,629.49 and 437.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.69 : 1,629.49 = 437.25 : x
2. Step 2: Convert to fraction form
   1,086.69/1,629.49 = 437.25/x
3. Step 3: Cross multiply
   1,086.69x = 1,629.49 × 437.25
4. Step 4: Simplify right side
   1,086.69x = 712,494.50
5. Step 5: Solve for x
   x = 712,494.50/1,086.69
6. Step 6: Final answer
   x = 655.66