Finding the Fourth Proportional to 1,433.91, 1,979.06 and 992.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.91 : 1,979.06 = 992.37 : x
2. Step 2: Convert to fraction form
   1,433.91/1,979.06 = 992.37/x
3. Step 3: Cross multiply
   1,433.91x = 1,979.06 × 992.37
4. Step 4: Simplify right side
   1,433.91x = 1,963,954.81
5. Step 5: Solve for x
   x = 1,963,954.81/1,433.91
6. Step 6: Final answer
   x = 1,369.65