Finding the Fourth Proportional to 2,087.22, 3,131.28 and 626.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.22 : 3,131.28 = 626.52 : x
2. Step 2: Convert to fraction form
   2,087.22/3,131.28 = 626.52/x
3. Step 3: Cross multiply
   2,087.22x = 3,131.28 × 626.52
4. Step 4: Simplify right side
   2,087.22x = 1,961,809.55
5. Step 5: Solve for x
   x = 1,961,809.55/2,087.22
6. Step 6: Final answer
   x = 939.92