Finding the Fourth Proportional to 2,059.90, 3,090.15 and 672.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.90 : 3,090.15 = 672.89 : x
2. Step 2: Convert to fraction form
   2,059.90/3,090.15 = 672.89/x
3. Step 3: Cross multiply
   2,059.90x = 3,090.15 × 672.89
4. Step 4: Simplify right side
   2,059.90x = 2,079,331.03
5. Step 5: Solve for x
   x = 2,079,331.03/2,059.90
6. Step 6: Final answer
   x = 1,009.43