Finding the Fourth Proportional to 2,074.82, 3,112.04 and 688.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.82 : 3,112.04 = 688.14 : x
2. Step 2: Convert to fraction form
   2,074.82/3,112.04 = 688.14/x
3. Step 3: Cross multiply
   2,074.82x = 3,112.04 × 688.14
4. Step 4: Simplify right side
   2,074.82x = 2,141,519.21
5. Step 5: Solve for x
   x = 2,141,519.21/2,074.82
6. Step 6: Final answer
   x = 1,032.15