Finding the Fourth Proportional to 2,285.89, 3,428.82 and 554.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,285.89 : 3,428.82 = 554.50 : x
2. Step 2: Convert to fraction form
   2,285.89/3,428.82 = 554.50/x
3. Step 3: Cross multiply
   2,285.89x = 3,428.82 × 554.50
4. Step 4: Simplify right side
   2,285.89x = 1,901,280.69
5. Step 5: Solve for x
   x = 1,901,280.69/2,285.89
6. Step 6: Final answer
   x = 831.75