Finding the Fourth Proportional to 2,074.69, 3,111.67 and 688.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.69 : 3,111.67 = 688.84 : x
2. Step 2: Convert to fraction form
   2,074.69/3,111.67 = 688.84/x
3. Step 3: Cross multiply
   2,074.69x = 3,111.67 × 688.84
4. Step 4: Simplify right side
   2,074.69x = 2,143,442.76
5. Step 5: Solve for x
   x = 2,143,442.76/2,074.69
6. Step 6: Final answer
   x = 1,033.14