Finding the Fourth Proportional to 16,240.78, 22,412.28 and 8,788.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,240.78 : 22,412.28 = 8,788.78 : x
2. Step 2: Convert to fraction form
   16,240.78/22,412.28 = 8,788.78/x
3. Step 3: Cross multiply
   16,240.78x = 22,412.28 × 8,788.78
4. Step 4: Simplify right side
   16,240.78x = 196,976,598.22
5. Step 5: Solve for x
   x = 196,976,598.22/16,240.78
6. Step 6: Final answer
   x = 12,128.52