Finding the Fourth Proportional to 1,084.24, 1,496.37 and 642.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.24 : 1,496.37 = 642.25 : x
2. Step 2: Convert to fraction form
   1,084.24/1,496.37 = 642.25/x
3. Step 3: Cross multiply
   1,084.24x = 1,496.37 × 642.25
4. Step 4: Simplify right side
   1,084.24x = 961,043.63
5. Step 5: Solve for x
   x = 961,043.63/1,084.24
6. Step 6: Final answer
   x = 886.38