Finding the Fourth Proportional to 1,433.33, 1,978.95 and 992.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.33 : 1,978.95 = 992.59 : x
2. Step 2: Convert to fraction form
   1,433.33/1,978.95 = 992.59/x
3. Step 3: Cross multiply
   1,433.33x = 1,978.95 × 992.59
4. Step 4: Simplify right side
   1,433.33x = 1,964,285.98
5. Step 5: Solve for x
   x = 1,964,285.98/1,433.33
6. Step 6: Final answer
   x = 1,370.44