Finding the Fourth Proportional to 22,380.83, 30,885.55 and 12,309.95

Step by Step Solution

1. Step 1: Write the proportion equation
   22,380.83 : 30,885.55 = 12,309.95 : x
2. Step 2: Convert to fraction form
   22,380.83/30,885.55 = 12,309.95/x
3. Step 3: Cross multiply
   22,380.83x = 30,885.55 × 12,309.95
4. Step 4: Simplify right side
   22,380.83x = 380,199,576.22
5. Step 5: Solve for x
   x = 380,199,576.22/22,380.83
6. Step 6: Final answer
   x = 16,987.73