Finding the Fourth Proportional to 9,509.01, 13,121.55 and 5,530.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,509.01 : 13,121.55 = 5,530.07 : x
2. Step 2: Convert to fraction form
   9,509.01/13,121.55 = 5,530.07/x
3. Step 3: Cross multiply
   9,509.01x = 13,121.55 × 5,530.07
4. Step 4: Simplify right side
   9,509.01x = 72,563,024.40
5. Step 5: Solve for x
   x = 72,563,024.40/9,509.01
6. Step 6: Final answer
   x = 7,630.98