Finding the Fourth Proportional to 9,409.23, 12,984.62 and 5,160.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,409.23 : 12,984.62 = 5,160.15 : x
2. Step 2: Convert to fraction form
   9,409.23/12,984.62 = 5,160.15/x
3. Step 3: Cross multiply
   9,409.23x = 12,984.62 × 5,160.15
4. Step 4: Simplify right side
   9,409.23x = 67,002,561.09
5. Step 5: Solve for x
   x = 67,002,561.09/9,409.23
6. Step 6: Final answer
   x = 7,120.94