Finding the Fourth Proportional to 1,086.98, 1,630.49 and 624.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.98 : 1,630.49 = 624.42 : x
2. Step 2: Convert to fraction form
   1,086.98/1,630.49 = 624.42/x
3. Step 3: Cross multiply
   1,086.98x = 1,630.49 × 624.42
4. Step 4: Simplify right side
   1,086.98x = 1,018,107.44
5. Step 5: Solve for x
   x = 1,018,107.44/1,086.98
6. Step 6: Final answer
   x = 936.64