Finding the Fourth Proportional to 8,789.28, 13,184.72 and 2,947.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,789.28 : 13,184.72 = 2,947.56 : x
2. Step 2: Convert to fraction form
   8,789.28/13,184.72 = 2,947.56/x
3. Step 3: Cross multiply
   8,789.28x = 13,184.72 × 2,947.56
4. Step 4: Simplify right side
   8,789.28x = 38,862,753.28
5. Step 5: Solve for x
   x = 38,862,753.28/8,789.28
6. Step 6: Final answer
   x = 4,421.61