Finding the Fourth Proportional to 2,059.62, 3,087.78 and 672.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.62 : 3,087.78 = 672.12 : x
2. Step 2: Convert to fraction form
   2,059.62/3,087.78 = 672.12/x
3. Step 3: Cross multiply
   2,059.62x = 3,087.78 × 672.12
4. Step 4: Simplify right side
   2,059.62x = 2,075,358.69
5. Step 5: Solve for x
   x = 2,075,358.69/2,059.62
6. Step 6: Final answer
   x = 1,007.64