Finding the Fourth Proportional to 12,522.30, 17,279.61 and 7,485.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,522.30 : 17,279.61 = 7,485.54 : x
2. Step 2: Convert to fraction form
   12,522.30/17,279.61 = 7,485.54/x
3. Step 3: Cross multiply
   12,522.30x = 17,279.61 × 7,485.54
4. Step 4: Simplify right side
   12,522.30x = 129,347,211.84
5. Step 5: Solve for x
   x = 129,347,211.84/12,522.30
6. Step 6: Final answer
   x = 10,329.35