Finding the Fourth Proportional to 2,087.24, 3,131.34 and 626.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.24 : 3,131.34 = 626.54 : x
2. Step 2: Convert to fraction form
   2,087.24/3,131.34 = 626.54/x
3. Step 3: Cross multiply
   2,087.24x = 3,131.34 × 626.54
4. Step 4: Simplify right side
   2,087.24x = 1,961,909.76
5. Step 5: Solve for x
   x = 1,961,909.76/2,087.24
6. Step 6: Final answer
   x = 939.95