Finding the Fourth Proportional to 9,648.42, 13,315.05 and 5,399.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,648.42 : 13,315.05 = 5,399.34 : x
2. Step 2: Convert to fraction form
   9,648.42/13,315.05 = 5,399.34/x
3. Step 3: Cross multiply
   9,648.42x = 13,315.05 × 5,399.34
4. Step 4: Simplify right side
   9,648.42x = 71,892,482.07
5. Step 5: Solve for x
   x = 71,892,482.07/9,648.42
6. Step 6: Final answer
   x = 7,451.22