Finding the Fourth Proportional to 2,019.65, 3,031.29 and 850.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.65 : 3,031.29 = 850.51 : x
2. Step 2: Convert to fraction form
   2,019.65/3,031.29 = 850.51/x
3. Step 3: Cross multiply
   2,019.65x = 3,031.29 × 850.51
4. Step 4: Simplify right side
   2,019.65x = 2,578,142.46
5. Step 5: Solve for x
   x = 2,578,142.46/2,019.65
6. Step 6: Final answer
   x = 1,276.53