Finding the Fourth Proportional to 22,459.40, 30,994.13 and 12,388.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,459.40 : 30,994.13 = 12,388.12 : x
2. Step 2: Convert to fraction form
   22,459.40/30,994.13 = 12,388.12/x
3. Step 3: Cross multiply
   22,459.40x = 30,994.13 × 12,388.12
4. Step 4: Simplify right side
   22,459.40x = 383,958,862.31
5. Step 5: Solve for x
   x = 383,958,862.31/22,459.40
6. Step 6: Final answer
   x = 17,095.68