Finding the Fourth Proportional to 1,112.36, 1,535.24 and 664.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.36 : 1,535.24 = 664.25 : x
2. Step 2: Convert to fraction form
   1,112.36/1,535.24 = 664.25/x
3. Step 3: Cross multiply
   1,112.36x = 1,535.24 × 664.25
4. Step 4: Simplify right side
   1,112.36x = 1,019,777.15
5. Step 5: Solve for x
   x = 1,019,777.15/1,112.36
6. Step 6: Final answer
   x = 916.77