Finding the Fourth Proportional to 22,199.86, 30,635.31 and 12,128.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,199.86 : 30,635.31 = 12,128.34 : x
2. Step 2: Convert to fraction form
   22,199.86/30,635.31 = 12,128.34/x
3. Step 3: Cross multiply
   22,199.86x = 30,635.31 × 12,128.34
4. Step 4: Simplify right side
   22,199.86x = 371,555,455.69
5. Step 5: Solve for x
   x = 371,555,455.69/22,199.86
6. Step 6: Final answer
   x = 16,736.84