Finding the Fourth Proportional to 9,405.12, 12,975.72 and 5,427.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,405.12 : 12,975.72 = 5,427.24 : x
2. Step 2: Convert to fraction form
   9,405.12/12,975.72 = 5,427.24/x
3. Step 3: Cross multiply
   9,405.12x = 12,975.72 × 5,427.24
4. Step 4: Simplify right side
   9,405.12x = 70,422,346.61
5. Step 5: Solve for x
   x = 70,422,346.61/9,405.12
6. Step 6: Final answer
   x = 7,487.66