Finding the Fourth Proportional to 1,083.69, 1,494.77 and 641.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.69 : 1,494.77 = 641.25 : x
2. Step 2: Convert to fraction form
   1,083.69/1,494.77 = 641.25/x
3. Step 3: Cross multiply
   1,083.69x = 1,494.77 × 641.25
4. Step 4: Simplify right side
   1,083.69x = 958,518.06
5. Step 5: Solve for x
   x = 958,518.06/1,083.69
6. Step 6: Final answer
   x = 884.49