Finding the Fourth Proportional to 17,377.20, 23,980.56 and 9,419.42

Step by Step Solution

1. Step 1: Write the proportion equation
   17,377.20 : 23,980.56 = 9,419.42 : x
2. Step 2: Convert to fraction form
   17,377.20/23,980.56 = 9,419.42/x
3. Step 3: Cross multiply
   17,377.20x = 23,980.56 × 9,419.42
4. Step 4: Simplify right side
   17,377.20x = 225,882,966.48
5. Step 5: Solve for x
   x = 225,882,966.48/17,377.20
6. Step 6: Final answer
   x = 12,998.81