Finding the Fourth Proportional to 8,945.88, 13,472.40 and 8,147.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,945.88 : 13,472.40 = 8,147.82 : x
2. Step 2: Convert to fraction form
   8,945.88/13,472.40 = 8,147.82/x
3. Step 3: Cross multiply
   8,945.88x = 13,472.40 × 8,147.82
4. Step 4: Simplify right side
   8,945.88x = 109,770,649.43
5. Step 5: Solve for x
   x = 109,770,649.43/8,945.88
6. Step 6: Final answer
   x = 12,270.53