Finding the Fourth Proportional to 9,155.48, 12,632.69 and 5,379.26

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155.48 : 12,632.69 = 5,379.26 : x
2. Step 2: Convert to fraction form
   9,155.48/12,632.69 = 5,379.26/x
3. Step 3: Cross multiply
   9,155.48x = 12,632.69 × 5,379.26
4. Step 4: Simplify right side
   9,155.48x = 67,954,474.29
5. Step 5: Solve for x
   x = 67,954,474.29/9,155.48
6. Step 6: Final answer
   x = 7,422.28