Finding the Fourth Proportional to 22,199.56, 30,635.43 and 12,128.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,199.56 : 30,635.43 = 12,128.18 : x
2. Step 2: Convert to fraction form
   22,199.56/30,635.43 = 12,128.18/x
3. Step 3: Cross multiply
   22,199.56x = 30,635.43 × 12,128.18
4. Step 4: Simplify right side
   22,199.56x = 371,551,810.76
5. Step 5: Solve for x
   x = 371,551,810.76/22,199.56
6. Step 6: Final answer
   x = 16,736.90