Finding the Fourth Proportional to 12,449.18, 18,654.31 and 7,822.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,449.18 : 18,654.31 = 7,822.46 : x
2. Step 2: Convert to fraction form
   12,449.18/18,654.31 = 7,822.46/x
3. Step 3: Cross multiply
   12,449.18x = 18,654.31 × 7,822.46
4. Step 4: Simplify right side
   12,449.18x = 145,922,620.88
5. Step 5: Solve for x
   x = 145,922,620.88/12,449.18
6. Step 6: Final answer
   x = 11,721.46