Finding the Fourth Proportional to 9,163.47, 12,645.46 and 5,387.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,163.47 : 12,645.46 = 5,387.05 : x
2. Step 2: Convert to fraction form
   9,163.47/12,645.46 = 5,387.05/x
3. Step 3: Cross multiply
   9,163.47x = 12,645.46 × 5,387.05
4. Step 4: Simplify right side
   9,163.47x = 68,121,747.83
5. Step 5: Solve for x
   x = 68,121,747.83/9,163.47
6. Step 6: Final answer
   x = 7,434.05