Finding the Fourth Proportional to 9,120.51, 13,679.69 and 2,880.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,120.51 : 13,679.69 = 2,880.27 : x
2. Step 2: Convert to fraction form
   9,120.51/13,679.69 = 2,880.27/x
3. Step 3: Cross multiply
   9,120.51x = 13,679.69 × 2,880.27
4. Step 4: Simplify right side
   9,120.51x = 39,401,186.31
5. Step 5: Solve for x
   x = 39,401,186.31/9,120.51
6. Step 6: Final answer
   x = 4,320.06