Finding the Fourth Proportional to 9,630.59, 13,290.05 and 5,381.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,630.59 : 13,290.05 = 5,381.38 : x
2. Step 2: Convert to fraction form
   9,630.59/13,290.05 = 5,381.38/x
3. Step 3: Cross multiply
   9,630.59x = 13,290.05 × 5,381.38
4. Step 4: Simplify right side
   9,630.59x = 71,518,715.91
5. Step 5: Solve for x
   x = 71,518,715.91/9,630.59
6. Step 6: Final answer
   x = 7,426.20