Finding the Fourth Proportional to 1,285.89, 1,929.69 and 555.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,285.89 : 1,929.69 = 555.54 : x
2. Step 2: Convert to fraction form
   1,285.89/1,929.69 = 555.54/x
3. Step 3: Cross multiply
   1,285.89x = 1,929.69 × 555.54
4. Step 4: Simplify right side
   1,285.89x = 1,072,019.98
5. Step 5: Solve for x
   x = 1,072,019.98/1,285.89
6. Step 6: Final answer
   x = 833.68