Finding the Fourth Proportional to 12,613.57, 17,406.72 and 7,311.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,613.57 : 17,406.72 = 7,311.47 : x
2. Step 2: Convert to fraction form
   12,613.57/17,406.72 = 7,311.47/x
3. Step 3: Cross multiply
   12,613.57x = 17,406.72 × 7,311.47
4. Step 4: Simplify right side
   12,613.57x = 127,268,624.04
5. Step 5: Solve for x
   x = 127,268,624.04/12,613.57
6. Step 6: Final answer
   x = 10,089.82