Finding the Fourth Proportional to 8,805.18, 12,146.52 and 7,128.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,805.18 : 12,146.52 = 7,128.48 : x
2. Step 2: Convert to fraction form
   8,805.18/12,146.52 = 7,128.48/x
3. Step 3: Cross multiply
   8,805.18x = 12,146.52 × 7,128.48
4. Step 4: Simplify right side
   8,805.18x = 86,586,224.89
5. Step 5: Solve for x
   x = 86,586,224.89/8,805.18
6. Step 6: Final answer
   x = 9,833.56