Finding the Fourth Proportional to 1,241.34, 1,711.98 and 909.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,241.34 : 1,711.98 = 909.69 : x
2. Step 2: Convert to fraction form
   1,241.34/1,711.98 = 909.69/x
3. Step 3: Cross multiply
   1,241.34x = 1,711.98 × 909.69
4. Step 4: Simplify right side
   1,241.34x = 1,557,371.09
5. Step 5: Solve for x
   x = 1,557,371.09/1,241.34
6. Step 6: Final answer
   x = 1,254.59