Finding the Fourth Proportional to 2,087.48, 3,131.67 and 626.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.48 : 3,131.67 = 626.51 : x
2. Step 2: Convert to fraction form
   2,087.48/3,131.67 = 626.51/x
3. Step 3: Cross multiply
   2,087.48x = 3,131.67 × 626.51
4. Step 4: Simplify right side
   2,087.48x = 1,962,022.57
5. Step 5: Solve for x
   x = 1,962,022.57/2,087.48
6. Step 6: Final answer
   x = 939.90