Finding the Fourth Proportional to 8,945.14, 12,341.78 and 5,591.36

Step by Step Solution

1. Step 1: Write the proportion equation
   8,945.14 : 12,341.78 = 5,591.36 : x
2. Step 2: Convert to fraction form
   8,945.14/12,341.78 = 5,591.36/x
3. Step 3: Cross multiply
   8,945.14x = 12,341.78 × 5,591.36
4. Step 4: Simplify right side
   8,945.14x = 69,007,379.85
5. Step 5: Solve for x
   x = 69,007,379.85/8,945.14
6. Step 6: Final answer
   x = 7,714.51