Finding the Fourth Proportional to 9,399.52, 12,972.72 and 5,419.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,399.52 : 12,972.72 = 5,419.84 : x
2. Step 2: Convert to fraction form
   9,399.52/12,972.72 = 5,419.84/x
3. Step 3: Cross multiply
   9,399.52x = 12,972.72 × 5,419.84
4. Step 4: Simplify right side
   9,399.52x = 70,310,066.76
5. Step 5: Solve for x
   x = 70,310,066.76/9,399.52
6. Step 6: Final answer
   x = 7,480.18