Finding the Fourth Proportional to 22,380.86, 30,886.10 and 12,309.86

Step by Step Solution

1. Step 1: Write the proportion equation
   22,380.86 : 30,886.10 = 12,309.86 : x
2. Step 2: Convert to fraction form
   22,380.86/30,886.10 = 12,309.86/x
3. Step 3: Cross multiply
   22,380.86x = 30,886.10 × 12,309.86
4. Step 4: Simplify right side
   22,380.86x = 380,203,566.95
5. Step 5: Solve for x
   x = 380,203,566.95/22,380.86
6. Step 6: Final answer
   x = 16,987.89