Finding the Fourth Proportional to 2,089.57, 3,134.35 and 628.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.57 : 3,134.35 = 628.72 : x
2. Step 2: Convert to fraction form
   2,089.57/3,134.35 = 628.72/x
3. Step 3: Cross multiply
   2,089.57x = 3,134.35 × 628.72
4. Step 4: Simplify right side
   2,089.57x = 1,970,609.72
5. Step 5: Solve for x
   x = 1,970,609.72/2,089.57
6. Step 6: Final answer
   x = 943.07