Finding the Fourth Proportional to 12,990.06, 19,487.52 and 4,227.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,990.06 : 19,487.52 = 4,227.48 : x
2. Step 2: Convert to fraction form
   12,990.06/19,487.52 = 4,227.48/x
3. Step 3: Cross multiply
   12,990.06x = 19,487.52 × 4,227.48
4. Step 4: Simplify right side
   12,990.06x = 82,383,101.05
5. Step 5: Solve for x
   x = 82,383,101.05/12,990.06
6. Step 6: Final answer
   x = 6,342.01