Finding the Fourth Proportional to 17,377.12, 23,980.42 and 9,419.28

Step by Step Solution

1. Step 1: Write the proportion equation
   17,377.12 : 23,980.42 = 9,419.28 : x
2. Step 2: Convert to fraction form
   17,377.12/23,980.42 = 9,419.28/x
3. Step 3: Cross multiply
   17,377.12x = 23,980.42 × 9,419.28
4. Step 4: Simplify right side
   17,377.12x = 225,878,290.50
5. Step 5: Solve for x
   x = 225,878,290.50/17,377.12
6. Step 6: Final answer
   x = 12,998.60