Finding the Fourth Proportional to 1,433.19, 1,978.23 and 935.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.19 : 1,978.23 = 935.91 : x
2. Step 2: Convert to fraction form
   1,433.19/1,978.23 = 935.91/x
3. Step 3: Cross multiply
   1,433.19x = 1,978.23 × 935.91
4. Step 4: Simplify right side
   1,433.19x = 1,851,437.92
5. Step 5: Solve for x
   x = 1,851,437.92/1,433.19
6. Step 6: Final answer
   x = 1,291.83