Finding the Fourth Proportional to 9,630.38, 13,290.21 and 5,381.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,630.38 : 13,290.21 = 5,381.30 : x
2. Step 2: Convert to fraction form
   9,630.38/13,290.21 = 5,381.30/x
3. Step 3: Cross multiply
   9,630.38x = 13,290.21 × 5,381.30
4. Step 4: Simplify right side
   9,630.38x = 71,518,640.30
5. Step 5: Solve for x
   x = 71,518,640.30/9,630.38
6. Step 6: Final answer
   x = 7,426.36