Finding the Fourth Proportional to 1,362.54, 1,879.50 and 857.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.54 : 1,879.50 = 857.58 : x
2. Step 2: Convert to fraction form
   1,362.54/1,879.50 = 857.58/x
3. Step 3: Cross multiply
   1,362.54x = 1,879.50 × 857.58
4. Step 4: Simplify right side
   1,362.54x = 1,611,821.61
5. Step 5: Solve for x
   x = 1,611,821.61/1,362.54
6. Step 6: Final answer
   x = 1,182.95