Finding the Fourth Proportional to 12,521.34, 17,279.46 and 7,216.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,521.34 : 17,279.46 = 7,216.16 : x
2. Step 2: Convert to fraction form
   12,521.34/17,279.46 = 7,216.16/x
3. Step 3: Cross multiply
   12,521.34x = 17,279.46 × 7,216.16
4. Step 4: Simplify right side
   12,521.34x = 124,691,261.68
5. Step 5: Solve for x
   x = 124,691,261.68/12,521.34
6. Step 6: Final answer
   x = 9,958.30