Finding the Fourth Proportional to 1,431.92, 1,976.38 and 933.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.92 : 1,976.38 = 933.69 : x
2. Step 2: Convert to fraction form
   1,431.92/1,976.38 = 933.69/x
3. Step 3: Cross multiply
   1,431.92x = 1,976.38 × 933.69
4. Step 4: Simplify right side
   1,431.92x = 1,845,323.91
5. Step 5: Solve for x
   x = 1,845,323.91/1,431.92
6. Step 6: Final answer
   x = 1,288.71