Finding the Fourth Proportional to 9,400.23, 12,968.80 and 5,419.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,400.23 : 12,968.80 = 5,419.89 : x
2. Step 2: Convert to fraction form
   9,400.23/12,968.80 = 5,419.89/x
3. Step 3: Cross multiply
   9,400.23x = 12,968.80 × 5,419.89
4. Step 4: Simplify right side
   9,400.23x = 70,289,411.79
5. Step 5: Solve for x
   x = 70,289,411.79/9,400.23
6. Step 6: Final answer
   x = 7,477.42