Finding the Fourth Proportional to 16,128.01, 22,256.65 and 9,054.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,128.01 : 22,256.65 = 9,054.42 : x
2. Step 2: Convert to fraction form
   16,128.01/22,256.65 = 9,054.42/x
3. Step 3: Cross multiply
   16,128.01x = 22,256.65 × 9,054.42
4. Step 4: Simplify right side
   16,128.01x = 201,521,056.89
5. Step 5: Solve for x
   x = 201,521,056.89/16,128.01
6. Step 6: Final answer
   x = 12,495.10