Finding the Fourth Proportional to 1,084.28, 1,495.67 and 664.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.28 : 1,495.67 = 664.82 : x
2. Step 2: Convert to fraction form
   1,084.28/1,495.67 = 664.82/x
3. Step 3: Cross multiply
   1,084.28x = 1,495.67 × 664.82
4. Step 4: Simplify right side
   1,084.28x = 994,348.01
5. Step 5: Solve for x
   x = 994,348.01/1,084.28
6. Step 6: Final answer
   x = 917.06