Finding the Fourth Proportional to 22,459.79, 30,994.64 and 12,388.49

Step by Step Solution

1. Step 1: Write the proportion equation
   22,459.79 : 30,994.64 = 12,388.49 : x
2. Step 2: Convert to fraction form
   22,459.79/30,994.64 = 12,388.49/x
3. Step 3: Cross multiply
   22,459.79x = 30,994.64 × 12,388.49
4. Step 4: Simplify right side
   22,459.79x = 383,976,896.15
5. Step 5: Solve for x
   x = 383,976,896.15/22,459.79
6. Step 6: Final answer
   x = 17,096.20