Finding the Fourth Proportional to 9,513.73, 13,128.94 and 5,321.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,513.73 : 13,128.94 = 5,321.98 : x
2. Step 2: Convert to fraction form
   9,513.73/13,128.94 = 5,321.98/x
3. Step 3: Cross multiply
   9,513.73x = 13,128.94 × 5,321.98
4. Step 4: Simplify right side
   9,513.73x = 69,871,956.10
5. Step 5: Solve for x
   x = 69,871,956.10/9,513.73
6. Step 6: Final answer
   x = 7,344.33