Finding the Fourth Proportional to 1,433.98, 1,978.59 and 909.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.98 : 1,978.59 = 909.73 : x
2. Step 2: Convert to fraction form
   1,433.98/1,978.59 = 909.73/x
3. Step 3: Cross multiply
   1,433.98x = 1,978.59 × 909.73
4. Step 4: Simplify right side
   1,433.98x = 1,799,982.68
5. Step 5: Solve for x
   x = 1,799,982.68/1,433.98
6. Step 6: Final answer
   x = 1,255.24