Finding the Fourth Proportional to 23,220, 32,043.60 and 12,609.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,220 : 32,043.60 = 12,609.72 : x
2. Step 2: Convert to fraction form
   23,220/32,043.60 = 12,609.72/x
3. Step 3: Cross multiply
   23,220x = 32,043.60 × 12,609.72
4. Step 4: Simplify right side
   23,220x = 404,060,823.79
5. Step 5: Solve for x
   x = 404,060,823.79/23,220
6. Step 6: Final answer
   x = 17,401.41