Finding the Fourth Proportional to 1,333.57, 1,996.25 and 870.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.57 : 1,996.25 = 870.35 : x
2. Step 2: Convert to fraction form
   1,333.57/1,996.25 = 870.35/x
3. Step 3: Cross multiply
   1,333.57x = 1,996.25 × 870.35
4. Step 4: Simplify right side
   1,333.57x = 1,737,436.19
5. Step 5: Solve for x
   x = 1,737,436.19/1,333.57
6. Step 6: Final answer
   x = 1,302.85