Finding the Fourth Proportional to 9,640.07, 13,303.98 and 5,391.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,640.07 : 13,303.98 = 5,391.53 : x
2. Step 2: Convert to fraction form
   9,640.07/13,303.98 = 5,391.53/x
3. Step 3: Cross multiply
   9,640.07x = 13,303.98 × 5,391.53
4. Step 4: Simplify right side
   9,640.07x = 71,728,784.93
5. Step 5: Solve for x
   x = 71,728,784.93/9,640.07
6. Step 6: Final answer
   x = 7,440.69