Finding the Fourth Proportional to 12,613.50, 17,405.32 and 7,767.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,613.50 : 17,405.32 = 7,767.46 : x
2. Step 2: Convert to fraction form
   12,613.50/17,405.32 = 7,767.46/x
3. Step 3: Cross multiply
   12,613.50x = 17,405.32 × 7,767.46
4. Step 4: Simplify right side
   12,613.50x = 135,195,062.20
5. Step 5: Solve for x
   x = 135,195,062.20/12,613.50
6. Step 6: Final answer
   x = 10,718.28