Finding the Fourth Proportional to 2,087.19, 3,131.27 and 626.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.19 : 3,131.27 = 626.37 : x
2. Step 2: Convert to fraction form
   2,087.19/3,131.27 = 626.37/x
3. Step 3: Cross multiply
   2,087.19x = 3,131.27 × 626.37
4. Step 4: Simplify right side
   2,087.19x = 1,961,330.46
5. Step 5: Solve for x
   x = 1,961,330.46/2,087.19
6. Step 6: Final answer
   x = 939.70