Finding the Fourth Proportional to 1,087.49, 1,498.97 and 909.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.49 : 1,498.97 = 909.83 : x
2. Step 2: Convert to fraction form
   1,087.49/1,498.97 = 909.83/x
3. Step 3: Cross multiply
   1,087.49x = 1,498.97 × 909.83
4. Step 4: Simplify right side
   1,087.49x = 1,363,813.90
5. Step 5: Solve for x
   x = 1,363,813.90/1,087.49
6. Step 6: Final answer
   x = 1,254.09