Finding the Fourth Proportional to 9,128.06, 12,596.71 and 4,936.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.06 : 12,596.71 = 4,936.31 : x
2. Step 2: Convert to fraction form
   9,128.06/12,596.71 = 4,936.31/x
3. Step 3: Cross multiply
   9,128.06x = 12,596.71 × 4,936.31
4. Step 4: Simplify right side
   9,128.06x = 62,181,177.88
5. Step 5: Solve for x
   x = 62,181,177.88/9,128.06
6. Step 6: Final answer
   x = 6,812.10