Finding the Fourth Proportional to 9,398.56, 12,969.80 and 5,419.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,398.56 : 12,969.80 = 5,419.56 : x
2. Step 2: Convert to fraction form
   9,398.56/12,969.80 = 5,419.56/x
3. Step 3: Cross multiply
   9,398.56x = 12,969.80 × 5,419.56
4. Step 4: Simplify right side
   9,398.56x = 70,290,609.29
5. Step 5: Solve for x
   x = 70,290,609.29/9,398.56
6. Step 6: Final answer
   x = 7,478.87