Finding the Fourth Proportional to 9,644.39, 13,311.69 and 5,455.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,644.39 : 13,311.69 = 5,455.07 : x
2. Step 2: Convert to fraction form
   9,644.39/13,311.69 = 5,455.07/x
3. Step 3: Cross multiply
   9,644.39x = 13,311.69 × 5,455.07
4. Step 4: Simplify right side
   9,644.39x = 72,616,200.77
5. Step 5: Solve for x
   x = 72,616,200.77/9,644.39
6. Step 6: Final answer
   x = 7,529.37