Finding the Fourth Proportional to 9,644.89, 13,312.38 and 5,455.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,644.89 : 13,312.38 = 5,455.57 : x
2. Step 2: Convert to fraction form
   9,644.89/13,312.38 = 5,455.57/x
3. Step 3: Cross multiply
   9,644.89x = 13,312.38 × 5,455.57
4. Step 4: Simplify right side
   9,644.89x = 72,626,620.96
5. Step 5: Solve for x
   x = 72,626,620.96/9,644.89
6. Step 6: Final answer
   x = 7,530.06