Finding the Fourth Proportional to 22,199.52, 30,634.82 and 12,128

Step by Step Solution

1. Step 1: Write the proportion equation
   22,199.52 : 30,634.82 = 12,128 : x
2. Step 2: Convert to fraction form
   22,199.52/30,634.82 = 12,128/x
3. Step 3: Cross multiply
   22,199.52x = 30,634.82 × 12,128
4. Step 4: Simplify right side
   22,199.52x = 371,539,096.96
5. Step 5: Solve for x
   x = 371,539,096.96/22,199.52
6. Step 6: Final answer
   x = 16,736.36