Finding the Fourth Proportional to 1,105.95, 1,655.74 and 909.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.95 : 1,655.74 = 909.12 : x
2. Step 2: Convert to fraction form
   1,105.95/1,655.74 = 909.12/x
3. Step 3: Cross multiply
   1,105.95x = 1,655.74 × 909.12
4. Step 4: Simplify right side
   1,105.95x = 1,505,273.69
5. Step 5: Solve for x
   x = 1,505,273.69/1,105.95
6. Step 6: Final answer
   x = 1,361.06