Finding the Fourth Proportional to 17,108.32, 25,671.52 and 12,142.80

Step by Step Solution

1. Step 1: Write the proportion equation
   17,108.32 : 25,671.52 = 12,142.80 : x
2. Step 2: Convert to fraction form
   17,108.32/25,671.52 = 12,142.80/x
3. Step 3: Cross multiply
   17,108.32x = 25,671.52 × 12,142.80
4. Step 4: Simplify right side
   17,108.32x = 311,724,133.06
5. Step 5: Solve for x
   x = 311,724,133.06/17,108.32
6. Step 6: Final answer
   x = 18,220.62