Finding the Fourth Proportional to 9,128.56, 12,597.36 and 4,936.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.56 : 12,597.36 = 4,936.72 : x
2. Step 2: Convert to fraction form
   9,128.56/12,597.36 = 4,936.72/x
3. Step 3: Cross multiply
   9,128.56x = 12,597.36 × 4,936.72
4. Step 4: Simplify right side
   9,128.56x = 62,189,639.06
5. Step 5: Solve for x
   x = 62,189,639.06/9,128.56
6. Step 6: Final answer
   x = 6,812.65