Finding the Fourth Proportional to 12,613.37, 17,406.09 and 7,236.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,613.37 : 17,406.09 = 7,236.71 : x
2. Step 2: Convert to fraction form
   12,613.37/17,406.09 = 7,236.71/x
3. Step 3: Cross multiply
   12,613.37x = 17,406.09 × 7,236.71
4. Step 4: Simplify right side
   12,613.37x = 125,962,803.81
5. Step 5: Solve for x
   x = 125,962,803.81/12,613.37
6. Step 6: Final answer
   x = 9,986.45