Finding the Fourth Proportional to 9,398.63, 12,967.17 and 5,419.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,398.63 : 12,967.17 = 5,419.21 : x
2. Step 2: Convert to fraction form
   9,398.63/12,967.17 = 5,419.21/x
3. Step 3: Cross multiply
   9,398.63x = 12,967.17 × 5,419.21
4. Step 4: Simplify right side
   9,398.63x = 70,271,817.34
5. Step 5: Solve for x
   x = 70,271,817.34/9,398.63
6. Step 6: Final answer
   x = 7,476.81