Finding the Fourth Proportional to 12,196.20, 16,830.98 and 7,478.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.20 : 16,830.98 = 7,478.76 : x
2. Step 2: Convert to fraction form
   12,196.20/16,830.98 = 7,478.76/x
3. Step 3: Cross multiply
   12,196.20x = 16,830.98 × 7,478.76
4. Step 4: Simplify right side
   12,196.20x = 125,874,859.98
5. Step 5: Solve for x
   x = 125,874,859.98/12,196.20
6. Step 6: Final answer
   x = 10,320.83