Finding the Fourth Proportional to 1,433.17, 1,976.83 and 909.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.17 : 1,976.83 = 909.91 : x
2. Step 2: Convert to fraction form
   1,433.17/1,976.83 = 909.91/x
3. Step 3: Cross multiply
   1,433.17x = 1,976.83 × 909.91
4. Step 4: Simplify right side
   1,433.17x = 1,798,737.39
5. Step 5: Solve for x
   x = 1,798,737.39/1,433.17
6. Step 6: Final answer
   x = 1,255.08