Finding the Fourth Proportional to 2,013.86, 3,019.87 and 626.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.86 : 3,019.87 = 626.79 : x
2. Step 2: Convert to fraction form
   2,013.86/3,019.87 = 626.79/x
3. Step 3: Cross multiply
   2,013.86x = 3,019.87 × 626.79
4. Step 4: Simplify right side
   2,013.86x = 1,892,824.32
5. Step 5: Solve for x
   x = 1,892,824.32/2,013.86
6. Step 6: Final answer
   x = 939.90