Finding the Fourth Proportional to 1,333.47, 1,997.19 and 920.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.47 : 1,997.19 = 920.73 : x
2. Step 2: Convert to fraction form
   1,333.47/1,997.19 = 920.73/x
3. Step 3: Cross multiply
   1,333.47x = 1,997.19 × 920.73
4. Step 4: Simplify right side
   1,333.47x = 1,838,872.75
5. Step 5: Solve for x
   x = 1,838,872.75/1,333.47
6. Step 6: Final answer
   x = 1,379.01