Finding the Fourth Proportional to 9,630.72, 13,289.94 and 5,438.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,630.72 : 13,289.94 = 5,438.16 : x
2. Step 2: Convert to fraction form
   9,630.72/13,289.94 = 5,438.16/x
3. Step 3: Cross multiply
   9,630.72x = 13,289.94 × 5,438.16
4. Step 4: Simplify right side
   9,630.72x = 72,272,820.11
5. Step 5: Solve for x
   x = 72,272,820.11/9,630.72
6. Step 6: Final answer
   x = 7,504.40