Finding the Fourth Proportional to 16,240.89, 22,412.43 and 8,788.89

Step by Step Solution

1. Step 1: Write the proportion equation
   16,240.89 : 22,412.43 = 8,788.89 : x
2. Step 2: Convert to fraction form
   16,240.89/22,412.43 = 8,788.89/x
3. Step 3: Cross multiply
   16,240.89x = 22,412.43 × 8,788.89
4. Step 4: Simplify right side
   16,240.89x = 196,980,381.90
5. Step 5: Solve for x
   x = 196,980,381.90/16,240.89
6. Step 6: Final answer
   x = 12,128.67