Finding the Fourth Proportional to 2,059.20, 3,089.12 and 672.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.20 : 3,089.12 = 672.12 : x
2. Step 2: Convert to fraction form
   2,059.20/3,089.12 = 672.12/x
3. Step 3: Cross multiply
   2,059.20x = 3,089.12 × 672.12
4. Step 4: Simplify right side
   2,059.20x = 2,076,259.33
5. Step 5: Solve for x
   x = 2,076,259.33/2,059.20
6. Step 6: Final answer
   x = 1,008.28