Finding the Fourth Proportional to 9,631.61, 13,290.28 and 5,382.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,631.61 : 13,290.28 = 5,382.13 : x
2. Step 2: Convert to fraction form
   9,631.61/13,290.28 = 5,382.13/x
3. Step 3: Cross multiply
   9,631.61x = 13,290.28 × 5,382.13
4. Step 4: Simplify right side
   9,631.61x = 71,530,014.70
5. Step 5: Solve for x
   x = 71,530,014.70/9,631.61
6. Step 6: Final answer
   x = 7,426.59