Finding the Fourth Proportional to 9,507.51, 13,119.48 and 5,528.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,507.51 : 13,119.48 = 5,528.57 : x
2. Step 2: Convert to fraction form
   9,507.51/13,119.48 = 5,528.57/x
3. Step 3: Cross multiply
   9,507.51x = 13,119.48 × 5,528.57
4. Step 4: Simplify right side
   9,507.51x = 72,531,897.95
5. Step 5: Solve for x
   x = 72,531,897.95/9,507.51
6. Step 6: Final answer
   x = 7,628.91