Finding the Fourth Proportional to 9,128.45, 12,610.79 and 7,233.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.45 : 12,610.79 = 7,233.96 : x
2. Step 2: Convert to fraction form
   9,128.45/12,610.79 = 7,233.96/x
3. Step 3: Cross multiply
   9,128.45x = 12,610.79 × 7,233.96
4. Step 4: Simplify right side
   9,128.45x = 91,225,917.74
5. Step 5: Solve for x
   x = 91,225,917.74/9,128.45
6. Step 6: Final answer
   x = 9,993.59