Finding the Fourth Proportional to 1,333.62, 1,841.26 and 861.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.62 : 1,841.26 = 861.72 : x
2. Step 2: Convert to fraction form
   1,333.62/1,841.26 = 861.72/x
3. Step 3: Cross multiply
   1,333.62x = 1,841.26 × 861.72
4. Step 4: Simplify right side
   1,333.62x = 1,586,650.57
5. Step 5: Solve for x
   x = 1,586,650.57/1,333.62
6. Step 6: Final answer
   x = 1,189.73