Finding the Fourth Proportional to 1,084.34, 1,496.37 and 642.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.34 : 1,496.37 = 642.26 : x
2. Step 2: Convert to fraction form
   1,084.34/1,496.37 = 642.26/x
3. Step 3: Cross multiply
   1,084.34x = 1,496.37 × 642.26
4. Step 4: Simplify right side
   1,084.34x = 961,058.60
5. Step 5: Solve for x
   x = 961,058.60/1,084.34
6. Step 6: Final answer
   x = 886.31