Finding the Fourth Proportional to 2,633.28, 3,947.18 and 1,072.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.28 : 3,947.18 = 1,072.61 : x
2. Step 2: Convert to fraction form
   2,633.28/3,947.18 = 1,072.61/x
3. Step 3: Cross multiply
   2,633.28x = 3,947.18 × 1,072.61
4. Step 4: Simplify right side
   2,633.28x = 4,233,759.64
5. Step 5: Solve for x
   x = 4,233,759.64/2,633.28
6. Step 6: Final answer
   x = 1,607.79