Finding the Fourth Proportional to 1,433.48, 1,978.64 and 935.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.48 : 1,978.64 = 935.24 : x
2. Step 2: Convert to fraction form
   1,433.48/1,978.64 = 935.24/x
3. Step 3: Cross multiply
   1,433.48x = 1,978.64 × 935.24
4. Step 4: Simplify right side
   1,433.48x = 1,850,503.27
5. Step 5: Solve for x
   x = 1,850,503.27/1,433.48
6. Step 6: Final answer
   x = 1,290.92