Finding the Fourth Proportional to 2,947.28, 4,419.75 and 1,072.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,947.28 : 4,419.75 = 1,072.72 : x
2. Step 2: Convert to fraction form
   2,947.28/4,419.75 = 1,072.72/x
3. Step 3: Cross multiply
   2,947.28x = 4,419.75 × 1,072.72
4. Step 4: Simplify right side
   2,947.28x = 4,741,143.17
5. Step 5: Solve for x
   x = 4,741,143.17/2,947.28
6. Step 6: Final answer
   x = 1,608.65