Finding the Fourth Proportional to 12,996.05, 19,496.70 and 4,228.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,996.05 : 19,496.70 = 4,228.61 : x
2. Step 2: Convert to fraction form
   12,996.05/19,496.70 = 4,228.61/x
3. Step 3: Cross multiply
   12,996.05x = 19,496.70 × 4,228.61
4. Step 4: Simplify right side
   12,996.05x = 82,443,843.10
5. Step 5: Solve for x
   x = 82,443,843.10/12,996.05
6. Step 6: Final answer
   x = 6,343.76