Finding the Fourth Proportional to 16,005.12, 22,089.06 and 9,289.30

Step by Step Solution

1. Step 1: Write the proportion equation
   16,005.12 : 22,089.06 = 9,289.30 : x
2. Step 2: Convert to fraction form
   16,005.12/22,089.06 = 9,289.30/x
3. Step 3: Cross multiply
   16,005.12x = 22,089.06 × 9,289.30
4. Step 4: Simplify right side
   16,005.12x = 205,191,905.06
5. Step 5: Solve for x
   x = 205,191,905.06/16,005.12
6. Step 6: Final answer
   x = 12,820.39