Finding the Fourth Proportional to 9,081.66, 12,530.79 and 5,353.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,081.66 : 12,530.79 = 5,353.50 : x
2. Step 2: Convert to fraction form
   9,081.66/12,530.79 = 5,353.50/x
3. Step 3: Cross multiply
   9,081.66x = 12,530.79 × 5,353.50
4. Step 4: Simplify right side
   9,081.66x = 67,083,584.27
5. Step 5: Solve for x
   x = 67,083,584.27/9,081.66
6. Step 6: Final answer
   x = 7,386.71