Finding the Fourth Proportional to 2,087.55, 3,131.39 and 626.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.55 : 3,131.39 = 626.72 : x
2. Step 2: Convert to fraction form
   2,087.55/3,131.39 = 626.72/x
3. Step 3: Cross multiply
   2,087.55x = 3,131.39 × 626.72
4. Step 4: Simplify right side
   2,087.55x = 1,962,485.95
5. Step 5: Solve for x
   x = 1,962,485.95/2,087.55
6. Step 6: Final answer
   x = 940.09