Finding the Fourth Proportional to 926.28, 1,269.72 and 909.72

Step by Step Solution

1. Step 1: Write the proportion equation
   926.28 : 1,269.72 = 909.72 : x
2. Step 2: Convert to fraction form
   926.28/1,269.72 = 909.72/x
3. Step 3: Cross multiply
   926.28x = 1,269.72 × 909.72
4. Step 4: Simplify right side
   926.28x = 1,155,089.68
5. Step 5: Solve for x
   x = 1,155,089.68/926.28
6. Step 6: Final answer
   x = 1,247.02