Finding the Fourth Proportional to 1,363.69, 1,881.39 and 920.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.69 : 1,881.39 = 920.89 : x
2. Step 2: Convert to fraction form
   1,363.69/1,881.39 = 920.89/x
3. Step 3: Cross multiply
   1,363.69x = 1,881.39 × 920.89
4. Step 4: Simplify right side
   1,363.69x = 1,732,553.24
5. Step 5: Solve for x
   x = 1,732,553.24/1,363.69
6. Step 6: Final answer
   x = 1,270.49