Finding the Fourth Proportional to 9,612.12, 13,262.94 and 5,419.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,612.12 : 13,262.94 = 5,419.56 : x
2. Step 2: Convert to fraction form
   9,612.12/13,262.94 = 5,419.56/x
3. Step 3: Cross multiply
   9,612.12x = 13,262.94 × 5,419.56
4. Step 4: Simplify right side
   9,612.12x = 71,879,299.11
5. Step 5: Solve for x
   x = 71,879,299.11/9,612.12
6. Step 6: Final answer
   x = 7,477.99