Finding the Fourth Proportional to 22,428.94, 30,951.80 and 12,357.15

Step by Step Solution

1. Step 1: Write the proportion equation
   22,428.94 : 30,951.80 = 12,357.15 : x
2. Step 2: Convert to fraction form
   22,428.94/30,951.80 = 12,357.15/x
3. Step 3: Cross multiply
   22,428.94x = 30,951.80 × 12,357.15
4. Step 4: Simplify right side
   22,428.94x = 382,476,035.37
5. Step 5: Solve for x
   x = 382,476,035.37/22,428.94
6. Step 6: Final answer
   x = 17,052.79