Finding the Fourth Proportional to 22,381.36, 30,886.35 and 12,310.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,381.36 : 30,886.35 = 12,310.42 : x
2. Step 2: Convert to fraction form
   22,381.36/30,886.35 = 12,310.42/x
3. Step 3: Cross multiply
   22,381.36x = 30,886.35 × 12,310.42
4. Step 4: Simplify right side
   22,381.36x = 380,223,940.77
5. Step 5: Solve for x
   x = 380,223,940.77/22,381.36
6. Step 6: Final answer
   x = 16,988.42