Finding the Fourth Proportional to 1,362.49, 1,879.57 and 920.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.49 : 1,879.57 = 920.53 : x
2. Step 2: Convert to fraction form
   1,362.49/1,879.57 = 920.53/x
3. Step 3: Cross multiply
   1,362.49x = 1,879.57 × 920.53
4. Step 4: Simplify right side
   1,362.49x = 1,730,200.57
5. Step 5: Solve for x
   x = 1,730,200.57/1,362.49
6. Step 6: Final answer
   x = 1,269.88