Finding the Fourth Proportional to 9,648.90, 13,315.74 and 5,399.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,648.90 : 13,315.74 = 5,399.82 : x
2. Step 2: Convert to fraction form
   9,648.90/13,315.74 = 5,399.82/x
3. Step 3: Cross multiply
   9,648.90x = 13,315.74 × 5,399.82
4. Step 4: Simplify right side
   9,648.90x = 71,902,599.17
5. Step 5: Solve for x
   x = 71,902,599.17/9,648.90
6. Step 6: Final answer
   x = 7,451.90