Finding the Fourth Proportional to 22,311, 30,789.18 and 12,375

Step by Step Solution

1. Step 1: Write the proportion equation
   22,311 : 30,789.18 = 12,375 : x
2. Step 2: Convert to fraction form
   22,311/30,789.18 = 12,375/x
3. Step 3: Cross multiply
   22,311x = 30,789.18 × 12,375
4. Step 4: Simplify right side
   22,311x = 381,016,102.50
5. Step 5: Solve for x
   x = 381,016,102.50/22,311
6. Step 6: Final answer
   x = 17,077.50