Finding the Fourth Proportional to 1,363.55, 1,879.49 and 920.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.55 : 1,879.49 = 920.67 : x
2. Step 2: Convert to fraction form
   1,363.55/1,879.49 = 920.67/x
3. Step 3: Cross multiply
   1,363.55x = 1,879.49 × 920.67
4. Step 4: Simplify right side
   1,363.55x = 1,730,385.45
5. Step 5: Solve for x
   x = 1,730,385.45/1,363.55
6. Step 6: Final answer
   x = 1,269.03