Finding the Fourth Proportional to 9,164.15, 12,648.15 and 5,387.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,164.15 : 12,648.15 = 5,387.29 : x
2. Step 2: Convert to fraction form
   9,164.15/12,648.15 = 5,387.29/x
3. Step 3: Cross multiply
   9,164.15x = 12,648.15 × 5,387.29
4. Step 4: Simplify right side
   9,164.15x = 68,139,188.77
5. Step 5: Solve for x
   x = 68,139,188.77/9,164.15
6. Step 6: Final answer
   x = 7,435.41