Finding the Fourth Proportional to 9,322.28, 12,864.72 and 5,130.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,322.28 : 12,864.72 = 5,130.50 : x
2. Step 2: Convert to fraction form
   9,322.28/12,864.72 = 5,130.50/x
3. Step 3: Cross multiply
   9,322.28x = 12,864.72 × 5,130.50
4. Step 4: Simplify right side
   9,322.28x = 66,002,445.96
5. Step 5: Solve for x
   x = 66,002,445.96/9,322.28
6. Step 6: Final answer
   x = 7,080.08