Finding the Fourth Proportional to 1,308.55, 1,804.05 and 1,121.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.55 : 1,804.05 = 1,121.24 : x
2. Step 2: Convert to fraction form
   1,308.55/1,804.05 = 1,121.24/x
3. Step 3: Cross multiply
   1,308.55x = 1,804.05 × 1,121.24
4. Step 4: Simplify right side
   1,308.55x = 2,022,773.02
5. Step 5: Solve for x
   x = 2,022,773.02/1,308.55
6. Step 6: Final answer
   x = 1,545.81