Finding the Fourth Proportional to 9,322.12, 12,864.42 and 5,130.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,322.12 : 12,864.42 = 5,130.28 : x
2. Step 2: Convert to fraction form
   9,322.12/12,864.42 = 5,130.28/x
3. Step 3: Cross multiply
   9,322.12x = 12,864.42 × 5,130.28
4. Step 4: Simplify right side
   9,322.12x = 65,998,076.64
5. Step 5: Solve for x
   x = 65,998,076.64/9,322.12
6. Step 6: Final answer
   x = 7,079.73