Finding the Fourth Proportional to 2,087.42, 3,131.15 and 626.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.42 : 3,131.15 = 626.48 : x
2. Step 2: Convert to fraction form
   2,087.42/3,131.15 = 626.48/x
3. Step 3: Cross multiply
   2,087.42x = 3,131.15 × 626.48
4. Step 4: Simplify right side
   2,087.42x = 1,961,599.72
5. Step 5: Solve for x
   x = 1,961,599.72/2,087.42
6. Step 6: Final answer
   x = 939.73