Finding the Fourth Proportional to 22,386.79, 30,894.20 and 12,315.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,386.79 : 30,894.20 = 12,315.34 : x
2. Step 2: Convert to fraction form
   22,386.79/30,894.20 = 12,315.34/x
3. Step 3: Cross multiply
   22,386.79x = 30,894.20 × 12,315.34
4. Step 4: Simplify right side
   22,386.79x = 380,472,577.03
5. Step 5: Solve for x
   x = 380,472,577.03/22,386.79
6. Step 6: Final answer
   x = 16,995.41