Finding the Fourth Proportional to 9,507.72, 13,120.17 and 5,528.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,507.72 : 13,120.17 = 5,528.19 : x
2. Step 2: Convert to fraction form
   9,507.72/13,120.17 = 5,528.19/x
3. Step 3: Cross multiply
   9,507.72x = 13,120.17 × 5,528.19
4. Step 4: Simplify right side
   9,507.72x = 72,530,792.59
5. Step 5: Solve for x
   x = 72,530,792.59/9,507.72
6. Step 6: Final answer
   x = 7,628.62