Finding the Fourth Proportional to 8,947.76, 12,347.27 and 5,591.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,947.76 : 12,347.27 = 5,591.18 : x
2. Step 2: Convert to fraction form
   8,947.76/12,347.27 = 5,591.18/x
3. Step 3: Cross multiply
   8,947.76x = 12,347.27 × 5,591.18
4. Step 4: Simplify right side
   8,947.76x = 69,035,832.96
5. Step 5: Solve for x
   x = 69,035,832.96/8,947.76
6. Step 6: Final answer
   x = 7,715.44