Finding the Fourth Proportional to 1,355.37, 1,870.45 and 883.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.37 : 1,870.45 = 883.57 : x
2. Step 2: Convert to fraction form
   1,355.37/1,870.45 = 883.57/x
3. Step 3: Cross multiply
   1,355.37x = 1,870.45 × 883.57
4. Step 4: Simplify right side
   1,355.37x = 1,652,678.97
5. Step 5: Solve for x
   x = 1,652,678.97/1,355.37
6. Step 6: Final answer
   x = 1,219.36