Finding the Fourth Proportional to 21,800.22, 30,086.82 and 12,370.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,800.22 : 30,086.82 = 12,370.50 : x
2. Step 2: Convert to fraction form
   21,800.22/30,086.82 = 12,370.50/x
3. Step 3: Cross multiply
   21,800.22x = 30,086.82 × 12,370.50
4. Step 4: Simplify right side
   21,800.22x = 372,189,006.81
5. Step 5: Solve for x
   x = 372,189,006.81/21,800.22
6. Step 6: Final answer
   x = 17,072.72