Finding the Fourth Proportional to 1,083.89, 1,495.24 and 664.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.89 : 1,495.24 = 664.11 : x
2. Step 2: Convert to fraction form
   1,083.89/1,495.24 = 664.11/x
3. Step 3: Cross multiply
   1,083.89x = 1,495.24 × 664.11
4. Step 4: Simplify right side
   1,083.89x = 993,002.18
5. Step 5: Solve for x
   x = 993,002.18/1,083.89
6. Step 6: Final answer
   x = 916.14