Finding the Fourth Proportional to 9,645.57, 13,310.25 and 5,395.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,645.57 : 13,310.25 = 5,395.89 : x
2. Step 2: Convert to fraction form
   9,645.57/13,310.25 = 5,395.89/x
3. Step 3: Cross multiply
   9,645.57x = 13,310.25 × 5,395.89
4. Step 4: Simplify right side
   9,645.57x = 71,820,644.87
5. Step 5: Solve for x
   x = 71,820,644.87/9,645.57
6. Step 6: Final answer
   x = 7,445.97