Finding the Fourth Proportional to 1,083.27, 1,495.07 and 641.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.27 : 1,495.07 = 641.31 : x
2. Step 2: Convert to fraction form
   1,083.27/1,495.07 = 641.31/x
3. Step 3: Cross multiply
   1,083.27x = 1,495.07 × 641.31
4. Step 4: Simplify right side
   1,083.27x = 958,805.34
5. Step 5: Solve for x
   x = 958,805.34/1,083.27
6. Step 6: Final answer
   x = 885.10