Finding the Fourth Proportional to 1,285.41, 1,927.05 and 554.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,285.41 : 1,927.05 = 554.89 : x
2. Step 2: Convert to fraction form
   1,285.41/1,927.05 = 554.89/x
3. Step 3: Cross multiply
   1,285.41x = 1,927.05 × 554.89
4. Step 4: Simplify right side
   1,285.41x = 1,069,300.77
5. Step 5: Solve for x
   x = 1,069,300.77/1,285.41
6. Step 6: Final answer
   x = 831.88