Finding the Fourth Proportional to 22,381.91, 30,886.42 and 12,310.35

Step by Step Solution

1. Step 1: Write the proportion equation
   22,381.91 : 30,886.42 = 12,310.35 : x
2. Step 2: Convert to fraction form
   22,381.91/30,886.42 = 12,310.35/x
3. Step 3: Cross multiply
   22,381.91x = 30,886.42 × 12,310.35
4. Step 4: Simplify right side
   22,381.91x = 380,222,640.45
5. Step 5: Solve for x
   x = 380,222,640.45/22,381.91
6. Step 6: Final answer
   x = 16,987.94