Finding the Fourth Proportional to 1,084.14, 1,496.07 and 642.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.14 : 1,496.07 = 642.03 : x
2. Step 2: Convert to fraction form
   1,084.14/1,496.07 = 642.03/x
3. Step 3: Cross multiply
   1,084.14x = 1,496.07 × 642.03
4. Step 4: Simplify right side
   1,084.14x = 960,521.82
5. Step 5: Solve for x
   x = 960,521.82/1,084.14
6. Step 6: Final answer
   x = 885.98