Finding the Fourth Proportional to 9,630.53, 13,288.79 and 5,381.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,630.53 : 13,288.79 = 5,381.05 : x
2. Step 2: Convert to fraction form
   9,630.53/13,288.79 = 5,381.05/x
3. Step 3: Cross multiply
   9,630.53x = 13,288.79 × 5,381.05
4. Step 4: Simplify right side
   9,630.53x = 71,507,648.58
5. Step 5: Solve for x
   x = 71,507,648.58/9,630.53
6. Step 6: Final answer
   x = 7,425.10