Finding the Fourth Proportional to 9,507.38, 13,120.18 and 5,315.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,507.38 : 13,120.18 = 5,315.63 : x
2. Step 2: Convert to fraction form
   9,507.38/13,120.18 = 5,315.63/x
3. Step 3: Cross multiply
   9,507.38x = 13,120.18 × 5,315.63
4. Step 4: Simplify right side
   9,507.38x = 69,741,943.52
5. Step 5: Solve for x
   x = 69,741,943.52/9,507.38
6. Step 6: Final answer
   x = 7,335.56