Finding the Fourth Proportional to 1,083.50, 1,495.56 and 641.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.50 : 1,495.56 = 641.37 : x
2. Step 2: Convert to fraction form
   1,083.50/1,495.56 = 641.37/x
3. Step 3: Cross multiply
   1,083.50x = 1,495.56 × 641.37
4. Step 4: Simplify right side
   1,083.50x = 959,207.32
5. Step 5: Solve for x
   x = 959,207.32/1,083.50
6. Step 6: Final answer
   x = 885.29