Finding the Fourth Proportional to 12,655, 17,463.72 and 7,352.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,655 : 17,463.72 = 7,352.80 : x
2. Step 2: Convert to fraction form
   12,655/17,463.72 = 7,352.80/x
3. Step 3: Cross multiply
   12,655x = 17,463.72 × 7,352.80
4. Step 4: Simplify right side
   12,655x = 128,407,240.42
5. Step 5: Solve for x
   x = 128,407,240.42/12,655
6. Step 6: Final answer
   x = 10,146.76