Finding the Fourth Proportional to 16,109.20, 22,255.24 and 12,885.92

Step by Step Solution

1. Step 1: Write the proportion equation
   16,109.20 : 22,255.24 = 12,885.92 : x
2. Step 2: Convert to fraction form
   16,109.20/22,255.24 = 12,885.92/x
3. Step 3: Cross multiply
   16,109.20x = 22,255.24 × 12,885.92
4. Step 4: Simplify right side
   16,109.20x = 286,779,242.22
5. Step 5: Solve for x
   x = 286,779,242.22/16,109.20
6. Step 6: Final answer
   x = 17,802.20