Finding the Fourth Proportional to 17,377.86, 23,981.49 and 9,420.02

Step by Step Solution

1. Step 1: Write the proportion equation
   17,377.86 : 23,981.49 = 9,420.02 : x
2. Step 2: Convert to fraction form
   17,377.86/23,981.49 = 9,420.02/x
3. Step 3: Cross multiply
   17,377.86x = 23,981.49 × 9,420.02
4. Step 4: Simplify right side
   17,377.86x = 225,906,115.43
5. Step 5: Solve for x
   x = 225,906,115.43/17,377.86
6. Step 6: Final answer
   x = 12,999.65