Finding the Fourth Proportional to 22,380.84, 30,886.31 and 12,309.71

Step by Step Solution

1. Step 1: Write the proportion equation
   22,380.84 : 30,886.31 = 12,309.71 : x
2. Step 2: Convert to fraction form
   22,380.84/30,886.31 = 12,309.71/x
3. Step 3: Cross multiply
   22,380.84x = 30,886.31 × 12,309.71
4. Step 4: Simplify right side
   22,380.84x = 380,201,395.41
5. Step 5: Solve for x
   x = 380,201,395.41/22,380.84
6. Step 6: Final answer
   x = 16,987.81