Finding the Fourth Proportional to 20,671.16, 31,010.82 and 8,188.84

Step by Step Solution

1. Step 1: Write the proportion equation
   20,671.16 : 31,010.82 = 8,188.84 : x
2. Step 2: Convert to fraction form
   20,671.16/31,010.82 = 8,188.84/x
3. Step 3: Cross multiply
   20,671.16x = 31,010.82 × 8,188.84
4. Step 4: Simplify right side
   20,671.16x = 253,942,643.25
5. Step 5: Solve for x
   x = 253,942,643.25/20,671.16
6. Step 6: Final answer
   x = 12,284.88