Finding the Fourth Proportional to 9,515.33, 13,137.60 and 5,931.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,515.33 : 13,137.60 = 5,931.72 : x
2. Step 2: Convert to fraction form
   9,515.33/13,137.60 = 5,931.72/x
3. Step 3: Cross multiply
   9,515.33x = 13,137.60 × 5,931.72
4. Step 4: Simplify right side
   9,515.33x = 77,928,564.67
5. Step 5: Solve for x
   x = 77,928,564.67/9,515.33
6. Step 6: Final answer
   x = 8,189.80