Finding the Fourth Proportional to 2,632.70, 3,949.61 and 1,072.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,632.70 : 3,949.61 = 1,072.72 : x
2. Step 2: Convert to fraction form
   2,632.70/3,949.61 = 1,072.72/x
3. Step 3: Cross multiply
   2,632.70x = 3,949.61 × 1,072.72
4. Step 4: Simplify right side
   2,632.70x = 4,236,820.14
5. Step 5: Solve for x
   x = 4,236,820.14/2,632.70
6. Step 6: Final answer
   x = 1,609.30