Finding the Fourth Proportional to 9,419.32, 12,998.64 and 5,440.33

Step by Step Solution

1. Step 1: Write the proportion equation
   9,419.32 : 12,998.64 = 5,440.33 : x
2. Step 2: Convert to fraction form
   9,419.32/12,998.64 = 5,440.33/x
3. Step 3: Cross multiply
   9,419.32x = 12,998.64 × 5,440.33
4. Step 4: Simplify right side
   9,419.32x = 70,716,891.15
5. Step 5: Solve for x
   x = 70,716,891.15/9,419.32
6. Step 6: Final answer
   x = 7,507.64