Finding the Fourth Proportional to 10,792.02, 16,190.72 and 8,579.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,792.02 : 16,190.72 = 8,579.20 : x
2. Step 2: Convert to fraction form
   10,792.02/16,190.72 = 8,579.20/x
3. Step 3: Cross multiply
   10,792.02x = 16,190.72 × 8,579.20
4. Step 4: Simplify right side
   10,792.02x = 138,903,425.02
5. Step 5: Solve for x
   x = 138,903,425.02/10,792.02
6. Step 6: Final answer
   x = 12,870.94