Finding the Fourth Proportional to 12,880.93, 17,775.96 and 7,216.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,880.93 : 17,775.96 = 7,216.10 : x
2. Step 2: Convert to fraction form
   12,880.93/17,775.96 = 7,216.10/x
3. Step 3: Cross multiply
   12,880.93x = 17,775.96 × 7,216.10
4. Step 4: Simplify right side
   12,880.93x = 128,273,016.08
5. Step 5: Solve for x
   x = 128,273,016.08/12,880.93
6. Step 6: Final answer
   x = 9,958.37