Finding the Fourth Proportional to 12,648.96, 17,456.55 and 9,307.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.96 : 17,456.55 = 9,307.11 : x
2. Step 2: Convert to fraction form
   12,648.96/17,456.55 = 9,307.11/x
3. Step 3: Cross multiply
   12,648.96x = 17,456.55 × 9,307.11
4. Step 4: Simplify right side
   12,648.96x = 162,470,031.07
5. Step 5: Solve for x
   x = 162,470,031.07/12,648.96
6. Step 6: Final answer
   x = 12,844.54