Finding the Fourth Proportional to 9,420.75, 12,999.12 and 5,441.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,420.75 : 12,999.12 = 5,441.10 : x
2. Step 2: Convert to fraction form
   9,420.75/12,999.12 = 5,441.10/x
3. Step 3: Cross multiply
   9,420.75x = 12,999.12 × 5,441.10
4. Step 4: Simplify right side
   9,420.75x = 70,729,511.83
5. Step 5: Solve for x
   x = 70,729,511.83/9,420.75
6. Step 6: Final answer
   x = 7,507.84