Finding the Fourth Proportional to 17,377.98, 23,980.97 and 9,420.03

Step by Step Solution

1. Step 1: Write the proportion equation
   17,377.98 : 23,980.97 = 9,420.03 : x
2. Step 2: Convert to fraction form
   17,377.98/23,980.97 = 9,420.03/x
3. Step 3: Cross multiply
   17,377.98x = 23,980.97 × 9,420.03
4. Step 4: Simplify right side
   17,377.98x = 225,901,456.83
5. Step 5: Solve for x
   x = 225,901,456.83/17,377.98
6. Step 6: Final answer
   x = 12,999.29