Finding the Fourth Proportional to 12,016.79, 16,577.16 and 7,771.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,016.79 : 16,577.16 = 7,771.48 : x
2. Step 2: Convert to fraction form
   12,016.79/16,577.16 = 7,771.48/x
3. Step 3: Cross multiply
   12,016.79x = 16,577.16 × 7,771.48
4. Step 4: Simplify right side
   12,016.79x = 128,828,996.81
5. Step 5: Solve for x
   x = 128,828,996.81/12,016.79
6. Step 6: Final answer
   x = 10,720.75