Finding the Fourth Proportional to 16,128.54, 22,257.78 and 9,054.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,128.54 : 22,257.78 = 9,054.78 : x
2. Step 2: Convert to fraction form
   16,128.54/22,257.78 = 9,054.78/x
3. Step 3: Cross multiply
   16,128.54x = 22,257.78 × 9,054.78
4. Step 4: Simplify right side
   16,128.54x = 201,539,301.19
5. Step 5: Solve for x
   x = 201,539,301.19/16,128.54
6. Step 6: Final answer
   x = 12,495.82