Finding the Fourth Proportional to 1,109.63, 1,526.76 and 909.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.63 : 1,526.76 = 909.73 : x
2. Step 2: Convert to fraction form
   1,109.63/1,526.76 = 909.73/x
3. Step 3: Cross multiply
   1,109.63x = 1,526.76 × 909.73
4. Step 4: Simplify right side
   1,109.63x = 1,388,939.37
5. Step 5: Solve for x
   x = 1,388,939.37/1,109.63
6. Step 6: Final answer
   x = 1,251.71