Finding the Fourth Proportional to 12,520.35, 17,278.07 and 7,216.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,520.35 : 17,278.07 = 7,216.83 : x
2. Step 2: Convert to fraction form
   12,520.35/17,278.07 = 7,216.83/x
3. Step 3: Cross multiply
   12,520.35x = 17,278.07 × 7,216.83
4. Step 4: Simplify right side
   12,520.35x = 124,692,857.83
5. Step 5: Solve for x
   x = 124,692,857.83/12,520.35
6. Step 6: Final answer
   x = 9,959.22