Finding the Fourth Proportional to 9,383.28, 12,947.76 and 5,191.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,383.28 : 12,947.76 = 5,191.56 : x
2. Step 2: Convert to fraction form
   9,383.28/12,947.76 = 5,191.56/x
3. Step 3: Cross multiply
   9,383.28x = 12,947.76 × 5,191.56
4. Step 4: Simplify right side
   9,383.28x = 67,219,072.91
5. Step 5: Solve for x
   x = 67,219,072.91/9,383.28
6. Step 6: Final answer
   x = 7,163.71