Finding the Fourth Proportional to 16,510.78, 22,784.94 and 8,957.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,510.78 : 22,784.94 = 8,957.20 : x
2. Step 2: Convert to fraction form
   16,510.78/22,784.94 = 8,957.20/x
3. Step 3: Cross multiply
   16,510.78x = 22,784.94 × 8,957.20
4. Step 4: Simplify right side
   16,510.78x = 204,089,264.57
5. Step 5: Solve for x
   x = 204,089,264.57/16,510.78
6. Step 6: Final answer
   x = 12,360.97