Finding the Fourth Proportional to 9,647.47, 13,313.49 and 5,455.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,647.47 : 13,313.49 = 5,455.72 : x
2. Step 2: Convert to fraction form
   9,647.47/13,313.49 = 5,455.72/x
3. Step 3: Cross multiply
   9,647.47x = 13,313.49 × 5,455.72
4. Step 4: Simplify right side
   9,647.47x = 72,634,673.66
5. Step 5: Solve for x
   x = 72,634,673.66/9,647.47
6. Step 6: Final answer
   x = 7,528.88